Merge pull request #4327 from Karunakar/minor

removed warning because logger.warn differentiate the warings

actionpack/lib/action_controller/metal/request_forgery_protection.rb

@@ -74,7 +74,7 @@ def protect_from_forgery(options = {})
       # The actual before_filter that is used. Modify this to change how you handle unverified requests.
       def verify_authenticity_token
         unless verified_request?
-          logger.warn "WARNING: Can't verify CSRF token authenticity" if logger
+          logger.warn "Can't verify CSRF token authenticity" if logger
           handle_unverified_request
         end
       end