refactor: inline method

We're going to need to change the stoppedByVisitor boolean on line 360
depending on the if condition (deadline <= timestamp). We'll need to
inline the method to make that possible.

Note that the names deadline and messageKey were changed to
deadlineEntry and messageKeyEntry respectively. This is because the
method was static, but when inline this is no longer the case. The
variables would otherwise hide fields with the same names.

engine/src/main/java/io/camunda/zeebe/engine/state/message/DbMessageState.java

@@ -351,7 +351,12 @@ public boolean visitMessagesWithDeadlineBeforeTimestamp(
     deadlineColumnFamily.whileTrue(
         startAtKey,
         (key, value) -> {
-          final var shouldContinue = visit(timestamp, visitor, key);
+          boolean shouldContinue = false;
+          final long deadlineEntry = key.first().getValue();
+          if (deadlineEntry <= timestamp) {
+            final long messageKeyEntry = key.second().inner().getValue();
+            shouldContinue = visitor.visit(deadlineEntry, messageKeyEntry);
+          }
           stoppedByVisitor.set(!shouldContinue);
           return shouldContinue;
         });
@@ -368,16 +373,4 @@ public boolean exist(
 
     return messageIdColumnFamily.exists(nameCorrelationMessageIdKey);
   }
-
-  private static boolean visit(
-      final long timestamp,
-      final ExpiredMessageVisitor visitor,
-      final DbCompositeKey<DbLong, DbForeignKey<DbLong>> compositeDeadlineKey) {
-    final long deadline = compositeDeadlineKey.first().getValue();
-    if (deadline <= timestamp) {
-      final long messageKey = compositeDeadlineKey.second().inner().getValue();
-      return visitor.visit(deadline, messageKey);
-    }
-    return false;
-  }
 }