Fix some raw types

spring-batch-integration/src/test/java/org/springframework/batch/integration/partition/MessageChannelPartitionHandlerTests.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ *  Licensed 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
+ *
+ *          https://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.springframework.batch.integration.partition;
 
 import java.util.Collection;
@@ -34,7 +50,6 @@ import static org.mockito.Mockito.when;
  * @author Michael Minella
  *
  */
-@SuppressWarnings("raw")
 public class MessageChannelPartitionHandlerTests {
 
 	private MessageChannelPartitionHandler messageChannelPartitionHandler;