reswqa commented on code in PR #25324:
URL: https://github.com/apache/flink/pull/25324#discussion_r1764363643


##########
flink-tests/src/test/scala/org/apache/flink/api/scala/functions/ClosureCleanerITCase.scala:
##########
@@ -1,262 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.flink.api.scala.functions
-
-import org.apache.flink.api.common.InvalidProgramException
-import org.apache.flink.api.scala._
-import org.apache.flink.api.scala.ExecutionEnvironment
-import org.apache.flink.core.fs.FileSystem.WriteMode
-import org.apache.flink.test.util.{MultipleProgramsTestBaseJUnit4, 
TestBaseUtils}
-
-import MultipleProgramsTestBaseJUnit4.TestExecutionMode
-import org.junit.{After, Before, Rule, Test}
-import org.junit.Assert.fail
-import org.junit.rules.TemporaryFolder
-import org.junit.runner.RunWith
-import org.junit.runners.Parameterized
-
-/* The test cases are originally from the Apache Spark project. Like the 
ClosureCleaner itself. */
-
-@RunWith(classOf[Parameterized])
-class ClosureCleanerITCase(mode: TestExecutionMode) extends 
MultipleProgramsTestBaseJUnit4(mode) {

Review Comment:
   Can not remove this.



##########
flink-dist-scala/pom.xml:
##########
@@ -127,4 +127,4 @@ under the License.
                        </plugin>
                </plugins>
        </build>
-</project>
\ No newline at end of file
+</project>

Review Comment:
   ?



##########
flink-formats/flink-avro/src/test/resources/flink_11-kryo_registrations:
##########
@@ -0,0 +1,86 @@
+0,int

Review Comment:
   Why we need this file?



##########
flink-tests/src/test/scala/org/apache/flink/api/scala/migration/StatefulJobSavepointMigrationITCase.scala:
##########
@@ -1,380 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance
- * with the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.flink.api.scala.migration
-
-import org.apache.flink.FlinkVersion
-import org.apache.flink.api.common.accumulators.IntCounter
-import org.apache.flink.api.common.functions.{OpenContext, RichFlatMapFunction}
-import org.apache.flink.api.common.state.{ListState, ListStateDescriptor, 
ValueState, ValueStateDescriptor}
-import org.apache.flink.api.java.functions.KeySelector
-import org.apache.flink.api.java.tuple.Tuple2
-import org.apache.flink.api.scala._
-import org.apache.flink.api.scala.migration.CustomEnum.CustomEnum
-import org.apache.flink.configuration.Configuration
-import org.apache.flink.contrib.streaming.state.EmbeddedRocksDBStateBackend
-import org.apache.flink.runtime.state.{FunctionInitializationContext, 
FunctionSnapshotContext, StateBackendLoader}
-import org.apache.flink.runtime.state.hashmap.HashMapStateBackend
-import org.apache.flink.runtime.state.memory.MemoryStateBackend
-import org.apache.flink.streaming.api.TimeCharacteristic
-import org.apache.flink.streaming.api.checkpoint.CheckpointedFunction
-import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment
-import org.apache.flink.streaming.api.functions.sink.RichSinkFunction
-import org.apache.flink.streaming.api.functions.source.SourceFunction
-import org.apache.flink.streaming.api.watermark.Watermark
-import org.apache.flink.test.checkpointing.utils.SnapshotMigrationTestBase
-import 
org.apache.flink.test.checkpointing.utils.SnapshotMigrationTestBase.{ExecutionMode,
 SnapshotSpec, SnapshotType}
-import org.apache.flink.test.util.MigrationTest
-import org.apache.flink.test.util.MigrationTest.ParameterizedSnapshotsGenerator
-import org.apache.flink.util.Collector
-
-import org.junit.Test
-import org.junit.runner.RunWith
-import org.junit.runners.Parameterized
-
-import javax.annotation.Nullable
-
-import java.util
-import java.util.function.BiFunction
-import java.util.stream.Collectors
-
-import scala.util.{Failure, Try}
-
-object StatefulJobSavepointMigrationITCase {

Review Comment:
   Can not remove tests from `migration` dir.



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