Do not overwrite Object.freeze

Summary: Now that React Native ships with a newer version of JSC, we do not need this code to wrap `Object.freeze` any longer.

Reviewed By: mmmulani

Differential Revision: D14779239

fbshipit-source-id: 1a6e1a9c7f4312572bd08ba604fa8c9d6b1927e1

Author: cpojer

Libraries/Core/__tests__/MapAndSetPolyfills-test.js

@@ -14,8 +14,6 @@ const {freeze, seal, preventExtensions} = Object;
 
 function setup() {
   jest.setMock('../../vendor/core/_shouldPolyfillES6Collection', () => true);
-  jest.unmock('_wrapObjectFreezeAndFriends');
-  require('_wrapObjectFreezeAndFriends');
 }
 
 function cleanup() {

Libraries/Core/polyfillES6Collections.js

@@ -18,10 +18,8 @@ const {polyfillGlobal} = require('PolyfillFunctions');
  */
 const _shouldPolyfillCollection = require('_shouldPolyfillES6Collection');
 if (_shouldPolyfillCollection('Map')) {
-  require('_wrapObjectFreezeAndFriends');
   polyfillGlobal('Map', () => require('Map'));
 }
 if (_shouldPolyfillCollection('Set')) {
-  require('_wrapObjectFreezeAndFriends');
   polyfillGlobal('Set', () => require('Set'));
 }

Libraries/vendor/core/Map.js

@@ -26,9 +26,6 @@ module.exports = (function(global, undefined) {
     return global.Map;
   }
 
-  // In case this module has not already been evaluated, import it now.
-  require('./_wrapObjectFreezeAndFriends');
-
   const hasOwn = Object.prototype.hasOwnProperty;
 
   /**