Update Endpoints Frameworks echo README to remove warning that local devserver will not work (GoogleCloudPlatform#902)

Author: bradfriedman

appengine/standard/endpoints-frameworks-v2/echo/README.md

@@ -31,6 +31,3 @@ Then, deploy the sample using `gcloud`:
     $ gcloud app deploy
 
 Once deployed, you can access the application at https://your-service.appspot.com
-
-Note that local deployment with dev_appserver.py is not yet supported with
-Endpoints Frameworks v2.