Remove unneeded function from Twitter sample.

Author: ekoleda

samples/Twitter.gs

@@ -24,15 +24,6 @@ function run() {
   }
 }
 
-/**
- * Encodes a string using the RFC 3986 spec.
- */
-function encodeRfc3986(str) {
-  return encodeURIComponent(str).replace(/[!'()]/g, function(char) {
-    return escape(char);
-  }).replace(/\*/g, "%2A");
-}
-
 /**
  * Reset the authorization state, so that it can be re-tested.
  */