Clean up warnings across code base

spring-web/src/main/java/org/springframework/http/client/reactive/ReactorClientHttpConnector.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -24,7 +24,6 @@ import reactor.core.publisher.Mono;
 import reactor.ipc.netty.http.client.HttpClientOptions;
 import reactor.ipc.netty.options.ClientOptions;
 import reactor.ipc.netty.http.client.HttpClient;
-import reactor.ipc.netty.http.client.HttpClientException;
 
 import org.springframework.http.HttpMethod;
 

spring-web/src/main/java/org/springframework/http/codec/ResourceRegionHttpMessageWriter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -34,7 +34,6 @@ import org.springframework.core.io.support.ResourceRegion;
 import org.springframework.http.MediaType;
 import org.springframework.http.ReactiveHttpOutputMessage;
 import org.springframework.http.ZeroCopyHttpOutputMessage;
-import org.springframework.util.ResourceUtils;
 
 /**
  * Implementation of {@link HttpMessageWriter} that can write

spring-web/src/main/java/org/springframework/http/codec/json/Jackson2JsonDecoder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -23,7 +23,6 @@ import java.util.Map;
 import com.fasterxml.jackson.databind.JavaType;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.ObjectReader;
-import com.fasterxml.jackson.databind.type.TypeFactory;
 import org.reactivestreams.Publisher;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;

spring-web/src/main/java/org/springframework/http/server/reactive/RxNettyHttpHandlerAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -24,15 +24,12 @@ import io.netty.handler.codec.http.HttpResponseStatus;
 import io.reactivex.netty.protocol.http.server.HttpServerRequest;
 import io.reactivex.netty.protocol.http.server.HttpServerResponse;
 import io.reactivex.netty.protocol.http.server.RequestHandler;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
 import org.reactivestreams.Publisher;
 import reactor.core.publisher.Mono;
 import rx.Observable;
 import rx.RxReactiveStreams;
 
 import org.springframework.core.io.buffer.NettyDataBufferFactory;
-import org.springframework.util.Assert;
 
 /**
  * Adapt {@link HttpHandler} to the RxNetty {@link RequestHandler}.

spring-web/src/main/java/org/springframework/http/server/reactive/RxNettyServerHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -19,7 +19,6 @@ package org.springframework.http.server.reactive;
 import java.net.InetSocketAddress;
 import java.net.URI;
 import java.net.URISyntaxException;
-import java.util.HashMap;
 
 import io.netty.buffer.ByteBuf;
 import io.netty.handler.codec.http.cookie.Cookie;

spring-web/src/main/java/org/springframework/web/bind/support/WebExchangeDataBinder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -16,7 +16,6 @@
 
 package org.springframework.web.bind.support;
 
-import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
@@ -25,8 +24,6 @@ import java.util.TreeMap;
 import reactor.core.publisher.Mono;
 
 import org.springframework.beans.MutablePropertyValues;
-import org.springframework.http.server.reactive.ServerHttpRequest;
-import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
 import org.springframework.web.bind.WebDataBinder;
 import org.springframework.web.multipart.MultipartFile;

spring-web/src/main/java/org/springframework/web/context/request/async/TimeoutCallableProcessingInterceptor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -17,9 +17,7 @@
 package org.springframework.web.context.request.async;
 
 import java.util.concurrent.Callable;
-import javax.servlet.http.HttpServletResponse;
 
-import org.springframework.http.HttpStatus;
 import org.springframework.web.context.request.NativeWebRequest;
 
 /**

spring-web/src/main/java/org/springframework/web/cors/reactive/DefaultCorsProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -30,7 +30,6 @@ import org.springframework.http.server.reactive.ServerHttpResponse;
 import org.springframework.util.CollectionUtils;
 import org.springframework.web.cors.CorsConfiguration;
 import org.springframework.web.server.ServerWebExchange;
-import org.springframework.web.util.WebUtils;
 
 /**
  * The default implementation of {@link CorsProcessor},
@@ -52,7 +51,6 @@ public class DefaultCorsProcessor implements CorsProcessor {
 
 
 	@Override
-	@SuppressWarnings("resource")
 	public boolean processRequest(CorsConfiguration config, ServerWebExchange exchange) {
 
 		ServerHttpRequest request = exchange.getRequest();