33206: Removed lib/web/es6-collections.js and replaced usages with native JS

Author: anzin

app/code/Magento/Ui/view/base/requirejs-config.js

@@ -36,13 +36,6 @@ var config = {
  * Adds polyfills only for browser contexts which prevents bundlers from including them.
  */
 if (typeof window !== 'undefined' && window.document) {
-    /**
-     * Polyfill Map and WeakMap for older browsers that do not support them.
-     */
-    if (typeof Map === 'undefined' || typeof WeakMap === 'undefined') {
-        config.deps.push('es6-collections');
-    }
-
     /**
      * Polyfill MutationObserver only for the browsers that do not support it.
      */