Explicitly return NO CONTENT type response for http DELETE request

Change-Id: I920084b92197bb1687e7d978ad350b2e1290ecbc
diff --git a/src/main/java/org/onosproject/segmentrouting/web/PolicyWebResource.java b/src/main/java/org/onosproject/segmentrouting/web/PolicyWebResource.java
index 45af70e..9a19c37 100644
--- a/src/main/java/org/onosproject/segmentrouting/web/PolicyWebResource.java
+++ b/src/main/java/org/onosproject/segmentrouting/web/PolicyWebResource.java
@@ -64,7 +64,6 @@
      *
      * @param input JSON stream for policy to create
      * @return status of the request - OK if the policy is created,
-     * INTERNAL_SERVER_ERROR if the JSON is invalid or the policy cannot be created
      * @throws IOException if JSON processing fails
      */
     @POST
@@ -87,8 +86,7 @@
      * Delete a segment routing policy.
      *
      * @param input JSON stream for policy to delete
-     * @return status of the request - OK if the policy is removed,
-     * INTERNAL_SERVER_ERROR otherwise
+     * @return 204 NO CONTENT if the policy is removed
      * @throws IOException if JSON is invalid
      */
     @DELETE
@@ -101,8 +99,7 @@
         // TODO: Check the result
         srService.removePolicy(policyInfo);
 
-        return Response.ok().build();
-
+        return Response.noContent().build();
     }
 
 }