Polish

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

@@ -74,7 +74,6 @@ public class StreamingResponseBodyReturnValueHandler implements HandlerMethodRet
 			returnValue = responseEntity.getBody();
 			if (returnValue == null) {
 				mavContainer.setRequestHandled(true);
-				// Ensure headers are flushed
 				outputMessage.flush();
 				return;
 			}