Remove unused code

Closes gh-2244

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/RequestMappingEndpoint.java

@@ -18,7 +18,6 @@ package org.springframework.boot.actuate.endpoint;
 
 import java.util.Collection;
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -84,11 +83,8 @@ public class RequestMappingEndpoint extends AbstractEndpoint<Map<String, Object>
 	protected void extractMethodMappings(ApplicationContext applicationContext,
 			Map<String, Object> result) {
 		if (applicationContext != null) {
-			Map<String, AbstractHandlerMethodMapping<?>> mappings = new HashMap<String, AbstractHandlerMethodMapping<?>>();
 			for (String name : applicationContext.getBeansOfType(
 					AbstractHandlerMethodMapping.class).keySet()) {
-				mappings.put(name, applicationContext.getBean(name,
-						AbstractHandlerMethodMapping.class));
 				@SuppressWarnings("unchecked")
 				Map<?, HandlerMethod> methods = applicationContext.getBean(name,
 						AbstractHandlerMethodMapping.class).getHandlerMethods();