Clean up warnings in spring-web

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

@@ -195,7 +195,6 @@ public class HttpComponentsClientHttpRequestFactory implements ClientHttpRequest
 
 
 	@Override
-	@SuppressWarnings("deprecation")
 	public ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod) throws IOException {
 		HttpClient client = getHttpClient();
 		Assert.state(client != null, "Synchronous execution requires an HttpClient to be set");

spring-web/src/main/java/org/springframework/http/converter/FormHttpMessageConverter.java

@@ -27,7 +27,6 @@ import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
-import java.util.Random;
 import javax.mail.internet.MimeUtility;
 
 import org.springframework.core.io.Resource;
@@ -99,8 +98,6 @@ public class FormHttpMessageConverter implements HttpMessageConverter<MultiValue
 
 	private List<HttpMessageConverter<?>> partConverters = new ArrayList<HttpMessageConverter<?>>();
 
-	private final Random random = new Random();
-
 
 	public FormHttpMessageConverter() {
 		this.supportedMediaTypes.add(MediaType.APPLICATION_FORM_URLENCODED);

spring-web/src/main/java/org/springframework/http/converter/json/Jackson2ObjectMapperBuilder.java

@@ -465,6 +465,7 @@ public class Jackson2ObjectMapperBuilder {
 	 * @see #modulesToInstall(Module...)
 	 * @see com.fasterxml.jackson.databind.Module
 	 */
+	@SuppressWarnings("unchecked")
 	public Jackson2ObjectMapperBuilder modulesToInstall(Class<? extends Module>... modules) {
 		this.moduleClasses = modules;
 		this.findWellKnownModules = true;
@@ -712,7 +713,6 @@ public class Jackson2ObjectMapperBuilder {
 	 * Obtain a {@link Jackson2ObjectMapperBuilder} instance in order to
 	 * build an {@link XmlMapper} instance.
 	 */
-	@SuppressWarnings("unchecked")
 	public static Jackson2ObjectMapperBuilder xml() {
 		return new Jackson2ObjectMapperBuilder().createXmlMapper(true);
 	}

spring-web/src/main/java/org/springframework/http/converter/json/Jackson2ObjectMapperFactoryBean.java

@@ -348,6 +348,7 @@ public class Jackson2ObjectMapperFactoryBean implements FactoryBean<ObjectMapper
 	 * @since 4.0.1
 	 * @see com.fasterxml.jackson.databind.Module
 	 */
+	@SuppressWarnings("unchecked")
 	public void setModulesToInstall(Class<? extends Module>... modules) {
 		this.builder.modulesToInstall(modules);
 	}
@@ -391,7 +392,6 @@ public class Jackson2ObjectMapperFactoryBean implements FactoryBean<ObjectMapper
 
 
 	@Override
-	@SuppressWarnings("unchecked")
 	public void afterPropertiesSet() {
 		if (this.objectMapper != null) {
 			this.builder.configure(this.objectMapper);

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

@@ -34,7 +34,6 @@ import org.springframework.http.server.ServerHttpRequest;
 import org.springframework.http.server.ServerHttpResponse;
 import org.springframework.http.server.ServletServerHttpRequest;
 import org.springframework.http.server.ServletServerHttpResponse;
-import org.springframework.util.Assert;
 import org.springframework.util.CollectionUtils;
 
 /**

spring-web/src/main/java/org/springframework/web/util/HierarchicalUriComponents.java

@@ -872,7 +872,6 @@ final class HierarchicalUriComponents extends UriComponents {
 		@Override
 		public void copyToUriComponentsBuilder(UriComponentsBuilder builder) {
 		}
-		@SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
 		@Override
 		public boolean equals(Object obj) {
 			return (this == obj);

spring-web/src/main/java/org/springframework/web/util/WebUtils.java

@@ -33,9 +33,6 @@ import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import javax.servlet.http.HttpSession;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
 import org.springframework.http.HttpRequest;
 import org.springframework.util.Assert;
 import org.springframework.util.CollectionUtils;
@@ -135,14 +132,12 @@ public abstract class WebUtils {
 	/** Key for the mutex session attribute */
 	public static final String SESSION_MUTEX_ATTRIBUTE = WebUtils.class.getName() + ".MUTEX";
 
-	private static final Log logger = LogFactory.getLog(WebUtils.class);
-
 
 	/**
 	 * Set a system property to the web application root directory.
 	 * The key of the system property can be defined with the "webAppRootKey"
 	 * context-param in {@code web.xml}. Default is "webapp.root".
-	 * <p>Can be used for tools that support substition with {@code System.getProperty}
+	 * <p>Can be used for tools that support substitution with {@code System.getProperty}
 	 * values, like log4j's "${key}" syntax within log file locations.
 	 * @param servletContext the servlet context of the web application
 	 * @throws IllegalStateException if the system property is already set,