Fix [cast] compiler warnings

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/AbstractMessageConverterMethodArgumentResolver.java

@@ -132,7 +132,7 @@ public abstract class AbstractMessageConverterMethodArgumentResolver implements
 								logger.debug("Reading [" + targetType + "] as \"" +
 										contentType + "\" using [" + converter + "]");
 							}
-							return (T) genericConverter.read(targetType, contextClass, inputMessage);
+							return genericConverter.read(targetType, contextClass, inputMessage);
 						}
 					}
 					if (targetClass != null) {

spring-webmvc/src/main/java/org/springframework/web/servlet/tags/form/CheckboxTag.java

@@ -86,7 +86,7 @@ public class CheckboxTag extends AbstractSingleCheckedElementTag {
 			if (value == null) {
 				throw new IllegalArgumentException("Attribute 'value' is required when binding to non-boolean values");
 			}
-			Object resolvedValue = (value instanceof String ? evaluate("value", (String) value) : value);
+			Object resolvedValue = (value instanceof String ? evaluate("value", value) : value);
 			renderFromValue(resolvedValue, tagWriter);
 		}
 	}

spring-webmvc/src/main/java/org/springframework/web/servlet/view/BeanNameViewResolver.java

@@ -72,7 +72,7 @@ public class BeanNameViewResolver extends WebApplicationObjectSupport implements
 			// Allow for ViewResolver chaining.
 			return null;
 		}
-		return (View) context.getBean(viewName, View.class);
+		return context.getBean(viewName, View.class);
 	}
 
 }

spring-webmvc/src/main/java/org/springframework/web/servlet/view/XmlViewResolver.java

@@ -106,7 +106,7 @@ public class XmlViewResolver extends AbstractCachingViewResolver
 	protected View loadView(String viewName, Locale locale) throws BeansException {
 		BeanFactory factory = initFactory();
 		try {
-			return (View) factory.getBean(viewName, View.class);
+			return factory.getBean(viewName, View.class);
 		}
 		catch (NoSuchBeanDefinitionException ex) {
 			// to allow for ViewResolver chaining