Added es6-promise polyfill in browsers.

.spread() promise function

Author: Aamod Pisat

src/runtime/react-native/http.js

@@ -1,7 +1,3 @@
-import ES6Promise from 'es6-promise';
-import fetch from 'isomorphic-fetch';
-
-ES6Promise.polyfill();
 /**
  * @method spread
  * @description return the promise with the arguments.