Clean up warnings in spring-websocket

spring-websocket/src/main/java/org/springframework/web/socket/server/support/OriginHandshakeInterceptor.java

@@ -18,7 +18,6 @@ package org.springframework.web.socket.server.support;
 
 import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 

spring-websocket/src/test/java/org/springframework/web/socket/config/annotation/WebSocketMessageBrokerConfigurationSupportTests.java

@@ -211,7 +211,6 @@ public class WebSocketMessageBrokerConfigurationSupportTests {
 
 		@MessageMapping("/foo")
 		@SendTo("/bar")
-		@SuppressWarnings("unused")
 		public String handleMessage() {
 			return "bar";
 		}

spring-websocket/src/test/java/org/springframework/web/socket/messaging/StompSubProtocolHandlerTests.java

@@ -33,9 +33,6 @@ import org.springframework.context.ApplicationEvent;
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.messaging.Message;
 import org.springframework.messaging.MessageChannel;
-import org.springframework.messaging.MessageHandler;
-import org.springframework.messaging.MessagingException;
-import org.springframework.messaging.SubscribableChannel;
 import org.springframework.messaging.simp.SimpAttributes;
 import org.springframework.messaging.simp.SimpAttributesContextHolder;
 import org.springframework.messaging.simp.SimpMessageHeaderAccessor;
@@ -48,7 +45,6 @@ import org.springframework.messaging.simp.stomp.StompHeaderAccessor;
 import org.springframework.messaging.simp.user.DefaultUserSessionRegistry;
 import org.springframework.messaging.simp.user.DestinationUserNameProvider;
 import org.springframework.messaging.simp.user.UserSessionRegistry;
-import org.springframework.messaging.support.AbstractMessageChannel;
 import org.springframework.messaging.support.ChannelInterceptorAdapter;
 import org.springframework.messaging.support.ExecutorSubscribableChannel;
 import org.springframework.messaging.support.ImmutableMessageChannelInterceptor;

spring-websocket/src/test/java/org/springframework/web/socket/server/support/AllowedOriginsInterceptorTests.java

@@ -18,7 +18,6 @@ package org.springframework.web.socket.server.support;
 
 import java.util.Arrays;
 import java.util.HashMap;
-import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ConcurrentSkipListSet;

spring-websocket/src/test/java/org/springframework/web/socket/sockjs/client/DefaultTransportRequestTests.java

@@ -74,7 +74,6 @@ public class DefaultTransportRequestTests {
 
 
 	@Test
-	@SuppressWarnings("unchecked")
 	public void connect() throws Exception {
 		DefaultTransportRequest request = createTransportRequest(this.webSocketTransport, TransportType.WEBSOCKET);
 		request.connect(null, this.connectFuture);

spring-websocket/src/test/java/org/springframework/web/socket/sockjs/client/SockJsClientTests.java

@@ -119,7 +119,6 @@ public class SockJsClientTests {
 	}
 
 	@Test
-	@SuppressWarnings("unchecked")
 	public void connectInfoRequestFailure() throws URISyntaxException {
 		HttpServerErrorException exception = new HttpServerErrorException(HttpStatus.SERVICE_UNAVAILABLE);
 		given(this.infoReceiver.executeInfoRequest(any())).willThrow(exception);

spring-websocket/src/test/java/org/springframework/web/socket/sockjs/support/SockJsServiceTests.java

@@ -47,8 +47,6 @@ import static org.mockito.BDDMockito.*;
  */
 public class SockJsServiceTests extends AbstractHttpRequestTests {
 
-	private static final List<String> origins = Arrays.asList("http://mydomain1.com", "http://mydomain2.com");
-
 	private TestSockJsService service;
 
 	private WebSocketHandler handler;