Clean up warnings in tests

spring-context/src/test/java/org/springframework/context/event/test/self_inject/MyEvent.java

@@ -21,6 +21,7 @@ import org.springframework.context.ApplicationEvent;
 @SuppressWarnings("serial")
 public class MyEvent extends ApplicationEvent {
 
+	@SuppressWarnings("unused")
 	private String message;
 
 	public MyEvent(Object source, String message) {

spring-context/src/test/java/org/springframework/context/event/test/self_inject/MyEventListener.java

@@ -25,6 +25,7 @@ public class MyEventListener implements ApplicationListener<MyEvent> {
 
 	public int eventCount;
 
+	@SuppressWarnings("unused")
 	@Autowired
 	private MyEventListener eventDemoListener;