DATAREST-1390 - Remove temporary workaround after upgrade to Spring 5.2 M3.

This reverts commit 8ce25f7918.

spring-data-rest-webmvc/src/main/java/org/springframework/data/rest/webmvc/BasePathAwareHandlerMapping.java

@@ -109,9 +109,6 @@ public class BasePathAwareHandlerMapping extends RequestMappingHandlerMapping {
 			mediaTypes.add(configuration.getDefaultMediaType());
 		}
 
-		// DATAREST-1390 - Temporary workaround
-		request.setAttribute(ProducesRequestCondition.class.getName() + ".MEDIA_TYPES", mediaTypes);
-
 		return super.lookupHandlerMethod(lookupPath, new CustomAcceptHeaderHttpServletRequest(request, mediaTypes));
 	}