XhrTransport implementations do not need to redeclare interface when extending from AbstractXhrTransport

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/client/JettyXhrTransport.java

@@ -60,7 +60,7 @@ import org.springframework.web.socket.sockjs.frame.SockJsFrame;
  * @author Rossen Stoyanchev
  * @since 4.1
  */
-public class JettyXhrTransport extends AbstractXhrTransport implements XhrTransport, Lifecycle {
+public class JettyXhrTransport extends AbstractXhrTransport implements Lifecycle {
 
 	private final HttpClient httpClient;
 

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/client/RestTemplateXhrTransport.java

@@ -50,7 +50,7 @@ import org.springframework.web.socket.sockjs.frame.SockJsFrame;
  * @author Rossen Stoyanchev
  * @since 4.1
  */
-public class RestTemplateXhrTransport extends AbstractXhrTransport implements XhrTransport {
+public class RestTemplateXhrTransport extends AbstractXhrTransport {
 
 	private final RestOperations restTemplate;
 

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/client/UndertowXhrTransport.java

@@ -82,7 +82,7 @@ import org.springframework.web.socket.sockjs.frame.SockJsFrame;
  * @since 4.1.2
  * @see org.xnio.Options
  */
-public class UndertowXhrTransport extends AbstractXhrTransport implements XhrTransport {
+public class UndertowXhrTransport extends AbstractXhrTransport {
 
 	private static final AttachmentKey<String> RESPONSE_BODY = AttachmentKey.create(String.class);