Remove handling of index.mapper.dynamic in AutoCreateIndex (#13067)

* Remove reference to INDEX_MAPPER_DYNAMIC_SETTING in AutoCreateIndex

Signed-off-by: Craig Perkins <cwperx@amazon.com>

* Add to CHANGELOG

Signed-off-by: Craig Perkins <cwperx@amazon.com>

---------

Signed-off-by: Craig Perkins <cwperx@amazon.com>

CHANGELOG.md

@@ -134,6 +134,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 ### Deprecated
 
 ### Removed
+- Remove handling of index.mapper.dynamic in AutoCreateIndex([#13067](https://github.com/opensearch-project/OpenSearch/pull/13067))
 
 ### Fixed
 - Fix bulk API ignores ingest pipeline for upsert ([#12883](https://github.com/opensearch-project/OpenSearch/pull/12883))

server/src/main/java/org/opensearch/action/support/AutoCreateIndex.java

@@ -43,7 +43,6 @@
 import org.opensearch.common.settings.Settings;
 import org.opensearch.core.common.Strings;
 import org.opensearch.index.IndexNotFoundException;
-import org.opensearch.index.mapper.MapperService;
 import org.opensearch.indices.SystemIndices;
 
 import java.util.ArrayList;
@@ -64,8 +63,6 @@ public final class AutoCreateIndex {
         Property.NodeScope,
         Setting.Property.Dynamic
     );
-
-    private final boolean dynamicMappingDisabled;
     private final IndexNameExpressionResolver resolver;
     private final SystemIndices systemIndices;
     private volatile AutoCreate autoCreate;
@@ -77,7 +74,6 @@ public AutoCreateIndex(
         SystemIndices systemIndices
     ) {
         this.resolver = resolver;
-        dynamicMappingDisabled = !MapperService.INDEX_MAPPER_DYNAMIC_SETTING.get(settings);
         this.systemIndices = systemIndices;
         this.autoCreate = AUTO_CREATE_INDEX_SETTING.get(settings);
         clusterSettings.addSettingsUpdateConsumer(AUTO_CREATE_INDEX_SETTING, this::setAutoCreate);
@@ -109,9 +105,6 @@ public boolean shouldAutoCreate(String index, ClusterState state) {
         if (autoCreate.autoCreateIndex == false) {
             throw new IndexNotFoundException("[" + AUTO_CREATE_INDEX_SETTING.getKey() + "] is [false]", index);
         }
-        if (dynamicMappingDisabled) {
-            throw new IndexNotFoundException("[" + MapperService.INDEX_MAPPER_DYNAMIC_SETTING.getKey() + "] is [false]", index);
-        }
         // matches not set, default value of "true"
         if (autoCreate.expressions.isEmpty()) {
             return true;