Clean up warnings and dead code in spring-webflux module

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/AbstractMessageWriterResultHandler.java

@@ -110,7 +110,7 @@ public abstract class AbstractMessageWriterResultHandler extends HandlerResultHa
 	 * @return indicates completion or error
 	 * @since 5.0.2
 	 */
-	@SuppressWarnings("unchecked")
+	@SuppressWarnings({ "unchecked", "rawtypes" })
 	protected Mono<Void> writeBody(@Nullable Object body, MethodParameter bodyParameter,
 			@Nullable MethodParameter actualParameter, ServerWebExchange exchange) {
 

spring-webflux/src/main/java/org/springframework/web/reactive/socket/adapter/TomcatWebSocketSession.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2018 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.
@@ -38,6 +38,7 @@ public class TomcatWebSocketSession extends StandardWebSocketSession {
 	private static final AtomicIntegerFieldUpdater<TomcatWebSocketSession> SUSPENDED =
 			AtomicIntegerFieldUpdater.newUpdater(TomcatWebSocketSession.class, "suspended");
 
+	@SuppressWarnings("unused")
 	private volatile int suspended;