Delete unused imports in spring-messaging

spring-messaging/src/main/java/org/springframework/messaging/simp/stomp/Reactor11TcpStompClient.java

@@ -31,7 +31,6 @@ import org.springframework.messaging.Message;
 import org.springframework.messaging.tcp.TcpOperations;
 import org.springframework.messaging.tcp.reactor.Reactor11TcpClient;
 import org.springframework.util.concurrent.ListenableFuture;
-import org.springframework.util.concurrent.SettableListenableFuture;
 
 /**
  * A STOMP over TCP client that uses

spring-messaging/src/main/java/org/springframework/messaging/simp/stomp/StompHeaders.java

@@ -16,7 +16,6 @@
 package org.springframework.messaging.simp.stomp;
 
 import java.io.Serializable;
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.LinkedHashMap;

spring-messaging/src/test/java/org/springframework/messaging/simp/broker/DefaultSubscriptionRegistryTests.java

@@ -331,6 +331,7 @@ public class DefaultSubscriptionRegistryTests {
 	// SPR-12665
 
 	@Test
+	@SuppressWarnings("rawtypes")
 	public void findSubscriptionsReturnsMapSafeToIterate() throws Exception {
 		this.registry.registerSubscription(subscribeMessage("sess1", "1", "/foo"));
 		this.registry.registerSubscription(subscribeMessage("sess2", "1", "/foo"));

spring-messaging/src/test/java/org/springframework/messaging/simp/stomp/DefaultStompSessionTests.java

@@ -20,7 +20,6 @@ import static org.junit.Assert.*;
 import static org.mockito.Matchers.any;
 import static org.mockito.Mockito.eq;
 import static org.mockito.Mockito.*;
-import static org.mockito.Mockito.same;
 
 import java.nio.charset.Charset;
 import java.util.Date;
@@ -539,8 +538,8 @@ public class DefaultStompSessionTests {
 		assertTrue(received.get());
 	}
 
-	@SuppressWarnings("unchecked")
 	@Test
+	@SuppressWarnings({ "unchecked", "rawtypes" })
 	public void receiptNotReceived() throws Exception {
 
 		TaskScheduler taskScheduler = mock(TaskScheduler.class);

spring-messaging/src/test/java/org/springframework/messaging/simp/stomp/StompClientSupportTests.java

@@ -15,15 +15,10 @@
  */
 package org.springframework.messaging.simp.stomp;
 
-import static org.junit.Assert.*;
-import static org.mockito.Matchers.same;
-
 import org.junit.Before;
-import org.junit.Rule;
 import org.junit.Test;
-import org.junit.rules.ExpectedException;
-import org.mockito.MockitoAnnotations;
 
+import static org.junit.Assert.*;
 
 /**
  * Unit tests for {@@link StompClientSupport}.