Enforce checks for unused imports and missed interpolation [databricks]

integration_tests/src/main/scala/com/nvidia/spark/rapids/tests/datasourcev2/parquet/TestingV2Source.scala

@@ -21,7 +21,7 @@ import scala.collection.JavaConverters._
 
 import org.apache.arrow.memory.RootAllocator
 import org.apache.arrow.vector._
-import org.apache.arrow.vector.complex.{ListVector, MapVector}
+import org.apache.arrow.vector.complex.MapVector
 import org.apache.arrow.vector.types.{DateUnit, FloatingPointPrecision, TimeUnit}
 import org.apache.arrow.vector.types.pojo.{ArrowType, Field, FieldType}
 import org.apache.arrow.vector.util.Text;

integration_tests/src/test/scala/com/nvidia/spark/rapids/tests/mortgage/MortgageAdaptiveSparkSuite.scala

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2020-2021, NVIDIA CORPORATION. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,8 +15,6 @@
  */
 package com.nvidia.spark.rapids.tests.mortgage
 
-import org.scalatest.Ignore
-
 class MortgageAdaptiveSparkSuite extends MortgageSparkSuite {
   override def adaptiveQueryEnabled: Boolean = true
 }

pom.xml

@@ -1047,6 +1047,8 @@
                             <arg>-feature</arg>
                             <arg>-explaintypes</arg>
                             <arg>-Yno-adapted-args</arg>
+                            <arg>-Ywarn-unused:imports</arg>
+                            <arg>-Xlint:missing-interpolator</arg>
                             <arg>-Xfatal-warnings</arg>
                         </args>
                         <jvmArgs>

sql-plugin/src/main/301until310-all/scala/com/nvidia/spark/rapids/shims/v2/OffsetWindowFunctionMeta.scala

@@ -18,7 +18,7 @@ package com.nvidia.spark.rapids.shims.v2
 
 import com.nvidia.spark.rapids.{BaseExprMeta, DataFromReplacementRule, ExprMeta, GpuOverrides, RapidsConf, RapidsMeta}
 
-import org.apache.spark.sql.catalyst.expressions.{Expression, Lag, Lead, Literal, OffsetWindowFunction}
+import org.apache.spark.sql.catalyst.expressions.{Lag, Lead, Literal, OffsetWindowFunction}
 import org.apache.spark.sql.types.IntegerType
 
 abstract class OffsetWindowFunctionMeta[INPUT <: OffsetWindowFunction] (

sql-plugin/src/main/301until320-all/scala/com/nvidia/spark/rapids/shims/v2/HashUtils.scala

@@ -16,7 +16,7 @@
 package com.nvidia.spark.rapids.shims.v2
 
 import ai.rapids.cudf
-import com.nvidia.spark.rapids.{Arm, ColumnCastUtil}
+import com.nvidia.spark.rapids.Arm
 
 object HashUtils extends Arm {
   /**

sql-plugin/src/main/301until320-nondb/scala/com/nvidia/spark/rapids/shims/v2/Spark30XShims.scala

@@ -18,13 +18,12 @@ package com.nvidia.spark.rapids.shims.v2
 
 import scala.collection.mutable.ListBuffer
 
-import com.nvidia.spark.rapids.{ExecChecks, ExecRule, GpuLiteral, SparkPlanMeta, SparkShims, TypeSig}
+import com.nvidia.spark.rapids.{ExecChecks, ExecRule, SparkPlanMeta, SparkShims, TypeSig}
 import com.nvidia.spark.rapids.GpuOverrides.exec
 import org.apache.hadoop.fs.FileStatus
 
 import org.apache.spark.sql.SparkSession
 import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions.Expression
 import org.apache.spark.sql.catalyst.plans.physical.BroadcastMode
 import org.apache.spark.sql.catalyst.util.{DateFormatter, DateTimeUtils}
 import org.apache.spark.sql.execution.SparkPlan

sql-plugin/src/main/311+-all/scala/com/nvidia/spark/rapids/shims/v2/ParquetCachedBatchSerializer.scala

@@ -52,7 +52,7 @@ import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.{Attribute, AttributeReference, Expression, GenericInternalRow, SpecializedGetters, UnsafeRow}
 import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection
 import org.apache.spark.sql.catalyst.util.{ArrayBasedMapData, ArrayData, GenericArrayData, MapData}
-import org.apache.spark.sql.columnar.{CachedBatch, CachedBatchSerializer}
+import org.apache.spark.sql.columnar.CachedBatch
 import org.apache.spark.sql.execution.datasources.parquet.{ParquetReadSupport, ParquetToSparkSchemaConverter, ParquetWriteSupport, SparkToParquetSchemaConverter, VectorizedColumnReader}
 import org.apache.spark.sql.execution.datasources.parquet.rapids.shims.v2.{ParquetRecordMaterializer, ShimVectorizedColumnReader}
 import org.apache.spark.sql.execution.vectorized.{OffHeapColumnVector, WritableColumnVector}

sql-plugin/src/main/311+-nondb/scala/com/nvidia/spark/rapids/shims/v2/GpuBroadcastHashJoinExec.scala

@@ -17,7 +17,6 @@
 package com.nvidia.spark.rapids.shims.v2
 
 import com.nvidia.spark.rapids._
-import com.nvidia.spark.rapids.shims.v2._
 
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow

sql-plugin/src/main/312db/scala/com/nvidia/spark/rapids/shims/v2/Spark30XShims.scala

@@ -18,17 +18,13 @@ package com.nvidia.spark.rapids.shims.v2
 
 import scala.collection.mutable.ListBuffer
 
-import com.nvidia.spark.rapids.{ExecChecks, ExecRule, GpuExec, SparkPlanMeta, SparkShims, TypeSig}
+import com.nvidia.spark.rapids.{ExecChecks, ExecRule, SparkPlanMeta, SparkShims, TypeSig}
 import com.nvidia.spark.rapids.GpuOverrides.exec
-import org.apache.hadoop.fs.FileStatus
 
 import org.apache.spark.sql.SparkSession
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.plans.physical.BroadcastMode
 import org.apache.spark.sql.catalyst.util.{DateFormatter, DateTimeUtils}
 import org.apache.spark.sql.execution.SparkPlan
 import org.apache.spark.sql.execution.adaptive.{AdaptiveSparkPlanExec, BroadcastQueryStageExec, CustomShuffleReaderExec, QueryStageExec, ShuffleQueryStageExec}
-import org.apache.spark.sql.execution.datasources.PartitioningAwareFileIndex
 import org.apache.spark.sql.execution.exchange.BroadcastExchangeExec
 import org.apache.spark.sql.execution.joins.{BroadcastHashJoinExec, BroadcastNestedLoopJoinExec, ShuffledHashJoinExec}
 import org.apache.spark.sql.internal.SQLConf

sql-plugin/src/main/31xdb/scala/com/nvidia/spark/rapids/shims/v2/GpuBroadcastHashJoinExec.scala

@@ -21,7 +21,7 @@ import com.nvidia.spark.rapids._
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.Expression
-import org.apache.spark.sql.catalyst.optimizer.{BuildLeft, BuildRight, BuildSide}
+import org.apache.spark.sql.catalyst.optimizer.{BuildLeft, BuildRight}
 import org.apache.spark.sql.catalyst.plans.{FullOuter, JoinType}
 import org.apache.spark.sql.catalyst.plans.physical.{BroadcastDistribution, Distribution, UnspecifiedDistribution}
 import org.apache.spark.sql.execution.{BinaryExecNode, SparkPlan}

sql-plugin/src/main/31xdb/scala/com/nvidia/spark/rapids/shims/v2/GpuRunningWindowExec.scala

@@ -17,7 +17,7 @@
 package com.nvidia.spark.rapids.shims.v2
 
 import com.databricks.sql.execution.window.RunningWindowFunctionExec
-import com.nvidia.spark.rapids.{BaseExprMeta, DataFromReplacementRule, GpuBaseWindowExecMeta, GpuExec, GpuOverrides, GpuWindowExec, RapidsConf, RapidsMeta, SparkPlanMeta}
+import com.nvidia.spark.rapids.{DataFromReplacementRule, GpuBaseWindowExecMeta, RapidsConf, RapidsMeta}
 
 import org.apache.spark.sql.catalyst.expressions.{Expression, NamedExpression, SortOrder}
 

sql-plugin/src/main/31xdb/scala/com/nvidia/spark/rapids/shims/v2/SparkBaseShims.scala

@@ -28,7 +28,7 @@ import org.apache.arrow.memory.ReferenceManager
 import org.apache.arrow.vector.ValueVector
 import org.apache.hadoop.fs.{FileStatus, Path}
 
-import org.apache.spark.{SparkContext, SparkEnv, TaskContext}
+import org.apache.spark.{SparkEnv, TaskContext}
 import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.SparkSession
 import org.apache.spark.sql.catalyst.{InternalRow, TableIdentifier}

sql-plugin/src/main/31xdb/scala/org/apache/spark/sql/rapids/execution/python/shims/v2/GpuGroupUDFArrowPythonRunner.scala

@@ -19,31 +19,17 @@
 
 package org.apache.spark.sql.rapids.execution.python.shims.v2
 
-import java.io.{DataInputStream, DataOutputStream}
+import java.io.DataOutputStream
 import java.net.Socket
-import java.util.concurrent.atomic.AtomicBoolean
-
-import scala.collection.mutable
-import scala.collection.mutable.ArrayBuffer
 
 import ai.rapids.cudf._
 import com.nvidia.spark.rapids._
-import com.nvidia.spark.rapids.GpuMetric._
-import com.nvidia.spark.rapids.RapidsPluginImplicits._
-import com.nvidia.spark.rapids.python.PythonWorkerSemaphore
 
 import org.apache.spark.{SparkEnv, TaskContext}
 import org.apache.spark.api.python._
-import org.apache.spark.rdd.RDD
-import org.apache.spark.sql.catalyst.InternalRow
-import org.apache.spark.sql.catalyst.expressions._
-import org.apache.spark.sql.catalyst.util.toPrettySQL
-import org.apache.spark.sql.execution.{SparkPlan, UnaryExecNode}
 import org.apache.spark.sql.execution.python.PythonUDFRunner
-import org.apache.spark.sql.internal.SQLConf
-import org.apache.spark.sql.rapids.execution.python.{BufferToStreamWriter, GpuArrowPythonRunner, GpuPythonHelper}
+import org.apache.spark.sql.rapids.execution.python.{BufferToStreamWriter, GpuArrowPythonRunner}
 import org.apache.spark.sql.types._
-import org.apache.spark.sql.util.ArrowUtils
 import org.apache.spark.sql.vectorized.ColumnarBatch
 import org.apache.spark.util.Utils
 

sql-plugin/src/main/320+/scala/org/apache/spark/sql/execution/datasources/parquet/rapids/shims/v2/ShimVectorizedColumnReader.scala

@@ -17,11 +17,10 @@
 package org.apache.spark.sql.execution.datasources.parquet.rapids.shims.v2
 
 import java.time.ZoneId
-import java.util.PrimitiveIterator
 
 import org.apache.parquet.column.ColumnDescriptor
-import org.apache.parquet.column.page.{PageReader, PageReadStore}
-import org.apache.parquet.schema.{GroupType, LogicalTypeAnnotation, OriginalType, Type}
+import org.apache.parquet.column.page.PageReadStore
+import org.apache.parquet.schema.{GroupType, Type}
 
 import org.apache.spark.sql.execution.datasources.parquet.{ParentContainerUpdater, ParquetRowConverter, ParquetToSparkSchemaConverter, VectorizedColumnReader}
 import org.apache.spark.sql.internal.SQLConf.LegacyBehaviorPolicy

sql-plugin/src/main/scala/com/nvidia/spark/rapids/AbstractGpuJoinIterator.scala

@@ -23,7 +23,7 @@ import ai.rapids.cudf.{GatherMap, NvtxColor, OutOfBoundsPolicy}
 import org.apache.spark.TaskContext
 import org.apache.spark.internal.Logging
 import org.apache.spark.sql.catalyst.expressions.Attribute
-import org.apache.spark.sql.catalyst.plans.{FullOuter, InnerLike, JoinType, LeftOuter, RightOuter}
+import org.apache.spark.sql.catalyst.plans.{InnerLike, JoinType, LeftOuter, RightOuter}
 import org.apache.spark.sql.vectorized.ColumnarBatch
 
 /**

sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuApproximatePercentile.scala

@@ -17,14 +17,13 @@
 package com.nvidia.spark.rapids
 
 import ai.rapids.cudf
-import ai.rapids.cudf.{GroupByAggregation, GroupByAggregationOnColumn}
+import ai.rapids.cudf.GroupByAggregation
 import com.nvidia.spark.rapids.GpuCast.doCast
 import com.nvidia.spark.rapids.shims.v2.ShimExpression
 
 import org.apache.spark.sql.catalyst.expressions.{AttributeReference, Expression}
 import org.apache.spark.sql.catalyst.expressions.aggregate.ApproximatePercentile
 import org.apache.spark.sql.catalyst.util.ArrayData
-import org.apache.spark.sql.internal.SQLConf
 import org.apache.spark.sql.rapids.{CudfAggregate, GpuAggregateFunction}
 import org.apache.spark.sql.types.{ArrayType, DataType, DataTypes, StructField, StructType}
 import org.apache.spark.sql.vectorized.ColumnarBatch

sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuBroadcastNestedLoopJoinExec.scala

@@ -16,7 +16,6 @@
 
 package com.nvidia.spark.rapids
 
-import com.nvidia.spark.rapids._
 import com.nvidia.spark.rapids.shims.v2._
 
 import org.apache.spark.sql.catalyst.expressions.Expression

sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuMultiFileReader.scala

@@ -22,7 +22,6 @@ import java.util.concurrent.{Callable, ConcurrentLinkedQueue, Future, LinkedBloc
 
 import scala.annotation.tailrec
 import scala.collection.JavaConverters._
-import scala.collection.immutable.HashSet
 import scala.collection.mutable.{ArrayBuffer, LinkedHashMap, Queue}
 import scala.math.max
 

sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuPartitioning.scala

@@ -25,7 +25,6 @@ import org.apache.spark.TaskContext
 import org.apache.spark.sql.catalyst.plans.physical.Partitioning
 import org.apache.spark.sql.internal.SQLConf
 import org.apache.spark.sql.rapids.GpuShuffleEnv
-import org.apache.spark.sql.types.DataType
 import org.apache.spark.sql.vectorized.ColumnarBatch
 
 trait GpuPartitioning extends Partitioning with Arm {

sql-plugin/src/main/scala/com/nvidia/spark/rapids/GpuWindowExpression.scala

@@ -18,8 +18,6 @@ package com.nvidia.spark.rapids
 
 import java.util.concurrent.TimeUnit
 
-import scala.language.{existentials, implicitConversions}
-
 import ai.rapids.cudf
 import ai.rapids.cudf.{BinaryOp, ColumnVector, DType, GroupByScanAggregation, RollingAggregation, RollingAggregationOnColumn, Scalar, ScanAggregation}
 import com.nvidia.spark.rapids.GpuOverrides.wrapExpr

sql-plugin/src/main/scala/com/nvidia/spark/rapids/RapidsMeta.scala

@@ -26,7 +26,6 @@ import org.apache.spark.sql.catalyst.plans.physical.Partitioning
 import org.apache.spark.sql.catalyst.trees.TreeNodeTag
 import org.apache.spark.sql.connector.read.Scan
 import org.apache.spark.sql.execution.SparkPlan
-import org.apache.spark.sql.execution.adaptive.QueryStageExec
 import org.apache.spark.sql.execution.aggregate.BaseAggregateExec
 import org.apache.spark.sql.execution.command.DataWritingCommand
 import org.apache.spark.sql.execution.exchange.ShuffleExchangeExec

sql-plugin/src/main/scala/com/nvidia/spark/rapids/ShuffleReceivedBufferCatalog.scala

@@ -17,21 +17,12 @@
 package com.nvidia.spark.rapids
 
 import java.io.File
-import java.util.UUID
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.atomic.AtomicInteger
-import java.util.function.{Consumer, IntUnaryOperator}
+import java.util.function.IntUnaryOperator
 
-import scala.collection.mutable.ArrayBuffer
-
-import ai.rapids.cudf.{Cuda, DeviceMemoryBuffer}
-import com.nvidia.spark.rapids.format.TableMeta
-
-import org.apache.spark.SparkEnv
 import org.apache.spark.internal.Logging
 import org.apache.spark.sql.rapids.RapidsDiskBlockManager
-import org.apache.spark.sql.rapids.execution.TrampolineUtil
-import org.apache.spark.storage.{BlockId, ShuffleBlockId}
 
 /** Identifier for a shuffle buffer that holds the data for a table on the read side */
 

sql-plugin/src/main/scala/com/nvidia/spark/rapids/aggregate.scala

@@ -22,7 +22,7 @@ import scala.annotation.tailrec
 import scala.collection.mutable
 
 import ai.rapids.cudf
-import ai.rapids.cudf.{NvtxColor, Scalar, Table}
+import ai.rapids.cudf.NvtxColor
 import com.nvidia.spark.rapids.GpuMetric._
 import com.nvidia.spark.rapids.RapidsPluginImplicits._
 import com.nvidia.spark.rapids.shims.v2.ShimUnaryExecNode
@@ -42,7 +42,7 @@ import org.apache.spark.sql.execution.{ExplainUtils, SortExec, SparkPlan}
 import org.apache.spark.sql.execution.aggregate.{BaseAggregateExec, HashAggregateExec, ObjectHashAggregateExec, SortAggregateExec}
 import org.apache.spark.sql.rapids.{CpuToGpuAggregateBufferConverter, CudfAggregate, GpuAggregateExpression, GpuToCpuAggregateBufferConverter}
 import org.apache.spark.sql.rapids.execution.{GpuShuffleMeta, TrampolineUtil}
-import org.apache.spark.sql.types.{ArrayType, DataType, LongType, MapType}
+import org.apache.spark.sql.types.{ArrayType, DataType, MapType}
 import org.apache.spark.sql.vectorized.ColumnarBatch
 
 object AggregateUtils {
@@ -406,7 +406,7 @@ class GpuHashAggregateIterator(
 
   /** Build an iterator that uses a sort-based approach to merge aggregated batches together. */
   private def buildSortFallbackIterator(): Iterator[ColumnarBatch] = {
-    logInfo("Falling back to sort-based aggregation with ${aggregatedBatches.size()} batches")
+    logInfo(s"Falling back to sort-based aggregation with ${aggregatedBatches.size()} batches")
     metrics.numTasksFallBacked += 1
     val aggregatedBatchIter = new Iterator[ColumnarBatch] {
       override def hasNext: Boolean = !aggregatedBatches.isEmpty

sql-plugin/src/main/scala/com/nvidia/spark/rapids/implicits.scala

@@ -28,7 +28,6 @@ import org.apache.spark.sql.vectorized.ColumnarBatch
  * and Array[AutoCloseable] that help make resource management easier within the project.
  */
 object RapidsPluginImplicits {
-  import scala.language.implicitConversions
 
   implicit class ReallyAGpuExpression[A <: Expression](exp: Expression) {
     def columnarEval(batch: ColumnarBatch): Any = {

sql-plugin/src/main/scala/com/nvidia/spark/rapids/literals.scala

@@ -659,7 +659,7 @@ case class GpuLiteral (value: Any, dataType: DataType) extends GpuLeafExpression
       case TimestampType =>
         ast.Literal.ofTimestampFromLong(DType.TIMESTAMP_MICROSECONDS,
           value.asInstanceOf[java.lang.Long])
-      case _ => throw new IllegalStateException("$dataType is an unsupported literal type")
+      case _ => throw new IllegalStateException(s"$dataType is an unsupported literal type")
     }
   }
 }

sql-plugin/src/main/scala/com/nvidia/spark/rapids/nullExpressions.scala

@@ -23,7 +23,7 @@ import com.nvidia.spark.rapids.RapidsPluginImplicits._
 import com.nvidia.spark.rapids.shims.v2.ShimExpression
 
 import org.apache.spark.sql.catalyst.expressions.{ComplexTypeMergingExpression, Expression, Predicate}
-import org.apache.spark.sql.types.{DataType, IntegerType}
+import org.apache.spark.sql.types.DataType
 import org.apache.spark.sql.vectorized.ColumnarBatch
 
 object GpuNvl extends Arm {

sql-plugin/src/main/scala/com/nvidia/spark/rapids/shuffle/RapidsShuffleServer.scala

@@ -16,7 +16,6 @@
 
 package com.nvidia.spark.rapids.shuffle
 
-import java.io.IOException
 import java.util.concurrent.{ConcurrentLinkedQueue, Executor}
 
 import scala.collection.mutable.ArrayBuffer

sql-plugin/src/main/scala/org/apache/spark/sql/rapids/GpuDataSource.scala

@@ -19,7 +19,6 @@ package org.apache.spark.sql.rapids
 import java.util.{Locale, ServiceConfigurationError, ServiceLoader}
 
 import scala.collection.JavaConverters._
-import scala.language.implicitConversions
 import scala.util.{Failure, Success, Try}
 
 import com.nvidia.spark.rapids.{ColumnarFileFormat, GpuParquetFileFormat, ShimLoader}

sql-plugin/src/main/scala/org/apache/spark/sql/rapids/GpuFileFormatWriter.scala

@@ -37,7 +37,7 @@ import org.apache.spark.sql.catalyst.catalog.BucketSpec
 import org.apache.spark.sql.catalyst.expressions.{Ascending, Attribute, AttributeSet, Expression}
 import org.apache.spark.sql.catalyst.util.{CaseInsensitiveMap, DateTimeUtils}
 import org.apache.spark.sql.execution.{SparkPlan, SQLExecution}
-import org.apache.spark.sql.execution.datasources.{WriteJobStatsTracker, WriteTaskResult, WriteTaskStats}
+import org.apache.spark.sql.execution.datasources.{WriteTaskResult, WriteTaskStats}
 import org.apache.spark.sql.execution.datasources.FileFormatWriter.OutputSpec
 import org.apache.spark.sql.types.{DataType, StringType, StructType}
 import org.apache.spark.sql.vectorized.ColumnarBatch

sql-plugin/src/main/scala/org/apache/spark/sql/rapids/collectionOperations.scala

@@ -19,8 +19,8 @@ package org.apache.spark.sql.rapids
 import scala.collection.mutable.ArrayBuffer
 
 import ai.rapids.cudf
-import ai.rapids.cudf.{ColumnView, CudfException, GroupByAggregation, GroupByOptions, ParquetWriterOptions, Scalar}
-import com.nvidia.spark.rapids.{GpuBinaryExpression, GpuColumnVector, GpuComplexTypeMergingExpression, GpuListUtils, GpuLiteral, GpuMapUtils, GpuScalar, GpuUnaryExpression}
+import ai.rapids.cudf.{ColumnView, GroupByAggregation, GroupByOptions, Scalar}
+import com.nvidia.spark.rapids.{GpuBinaryExpression, GpuColumnVector, GpuComplexTypeMergingExpression, GpuLiteral, GpuMapUtils, GpuScalar, GpuUnaryExpression}
 import com.nvidia.spark.rapids.GpuExpressionsUtils.columnarEvalToColumn
 import com.nvidia.spark.rapids.RapidsPluginImplicits._
 

sql-plugin/src/main/scala/org/apache/spark/sql/rapids/complexTypeCreator.scala

@@ -23,10 +23,10 @@ import com.nvidia.spark.rapids.shims.v2.ShimExpression
 
 import org.apache.spark.sql.catalyst.analysis.{TypeCheckResult, TypeCoercion}
 import org.apache.spark.sql.catalyst.analysis.FunctionRegistry.FUNC_ALIAS
-import org.apache.spark.sql.catalyst.expressions.{CreateMap, EmptyRow, Expression, NamedExpression}
+import org.apache.spark.sql.catalyst.expressions.{EmptyRow, Expression, NamedExpression}
 import org.apache.spark.sql.catalyst.util.TypeUtils
 import org.apache.spark.sql.internal.SQLConf
-import org.apache.spark.sql.types.{ArrayType, DataType, DataTypes, MapType, Metadata, NullType, StringType, StructField, StructType}
+import org.apache.spark.sql.types.{ArrayType, DataType, MapType, Metadata, NullType, StringType, StructField, StructType}
 import org.apache.spark.sql.vectorized.ColumnarBatch
 
 case class GpuCreateArray(children: Seq[Expression], useStringTypeWhenEmpty: Boolean)

sql-plugin/src/main/scala/org/apache/spark/sql/rapids/datetimeExpressions.scala

@@ -18,10 +18,8 @@ package org.apache.spark.sql.rapids
 
 import java.util.concurrent.TimeUnit
 
-import scala.collection.mutable
-
 import ai.rapids.cudf.{BinaryOp, ColumnVector, ColumnView, DType, Scalar}
-import com.nvidia.spark.rapids.{Arm, BinaryExprMeta, DataFromReplacementRule, DateUtils, GpuBinaryExpression, GpuColumnVector, GpuExpression, GpuOverrides, GpuScalar, GpuUnaryExpression, RapidsConf, RapidsMeta, ShimLoader}
+import com.nvidia.spark.rapids.{Arm, BinaryExprMeta, DataFromReplacementRule, DateUtils, GpuBinaryExpression, GpuColumnVector, GpuExpression, GpuOverrides, GpuScalar, GpuUnaryExpression, RapidsConf, RapidsMeta}
 import com.nvidia.spark.rapids.DateUtils.TimestampFormatConversionException
 import com.nvidia.spark.rapids.GpuOverrides.{extractStringLit, getTimeParserPolicy}
 import com.nvidia.spark.rapids.RapidsPluginImplicits._

sql-plugin/src/main/scala/org/apache/spark/sql/rapids/execution/GpuCustomShuffleReaderExec.scala

@@ -22,7 +22,7 @@ import org.apache.spark.rdd.RDD
 import org.apache.spark.sql.catalyst.InternalRow
 import org.apache.spark.sql.catalyst.expressions.{Attribute, Expression}
 import org.apache.spark.sql.catalyst.plans.physical.{Partitioning, UnknownPartitioning}
-import org.apache.spark.sql.execution.{CoalescedPartitionSpec, PartialMapperPartitionSpec, PartialReducerPartitionSpec, ShufflePartitionSpec, SparkPlan, UnaryExecNode}
+import org.apache.spark.sql.execution.{CoalescedPartitionSpec, PartialMapperPartitionSpec, PartialReducerPartitionSpec, ShufflePartitionSpec, SparkPlan}
 import org.apache.spark.sql.execution.adaptive.ShuffleQueryStageExec
 import org.apache.spark.sql.execution.exchange.{ReusedExchangeExec, ShuffleExchangeLike}
 import org.apache.spark.sql.vectorized.ColumnarBatch

sql-plugin/src/test/scala/com/nvidia/spark/rapids/GpuDeviceManagerSuite.scala

@@ -16,7 +16,7 @@
 
 package com.nvidia.spark.rapids
 
-import org.scalatest.{Assertion, FunSuite}
+import org.scalatest.FunSuite
 
 import org.apache.spark.SparkConf
 import org.apache.spark.resource.ResourceInformation