Removed outdated references to Servlet 2.3/2.4

(cherry picked from commit 673dac5)

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

@@ -48,7 +48,7 @@ import org.springframework.web.method.HandlerMethod;
  * in the application context, referenced by the mapping bean definition
  * via its "interceptors" property (in XML: a <list> of <ref>).
  *
- * <p>HandlerInterceptor is basically similar to a Servlet 2.3 Filter, but in
+ * <p>HandlerInterceptor is basically similar to a Servlet Filter, but in
  * contrast to the latter it just allows custom pre-processing with the option
  * of prohibiting the execution of the handler itself, and custom post-processing.
  * Filters are more powerful, for example they allow for exchanging the request

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2009 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -170,9 +170,9 @@ public abstract class AbstractTemplateView extends AbstractUrlBasedView {
 	/**
 	 * Apply this view's content type as specified in the "contentType"
 	 * bean property to the given response.
-	 * <p>When running on Servlet 2.4, only applies the view's contentType
-	 * if no content type has been set on the response before. This allows
-	 * handlers to override the default content type beforehand.
+	 * <p>Only applies the view's contentType if no content type has been
+	 * set on the response before. This allows handlers to override the
+	 * default content type beforehand.
 	 * @param response current HTTP response
 	 * @see #setContentType
 	 */