Delete explicit type arguments that can be inferred

Closes gh-26044

spring-webmvc/src/main/java/org/springframework/web/servlet/config/annotation/ViewResolverRegistry.java

@@ -284,7 +284,7 @@ public class ViewResolverRegistry {
 
 	protected List<ViewResolver> getViewResolvers() {
 		if (this.contentNegotiatingResolver != null) {
-			return Collections.<ViewResolver>singletonList(this.contentNegotiatingResolver);
+			return Collections.singletonList(this.contentNegotiatingResolver);
 		}
 		else {
 			return this.viewResolvers;

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

@@ -398,7 +398,7 @@ public class RedirectView extends AbstractUrlBasedView implements SmartView {
 	private Map<String, String> getCurrentRequestUriVariables(HttpServletRequest request) {
 		String name = HandlerMapping.URI_TEMPLATE_VARIABLES_ATTRIBUTE;
 		Map<String, String> uriVars = (Map<String, String>) request.getAttribute(name);
-		return (uriVars != null) ? uriVars : Collections.<String, String> emptyMap();
+		return (uriVars != null) ? uriVars : Collections.emptyMap();
 	}
 
 	/**