Revert "Commit updated Javascript packages"

This reverts commit a88734348a.

build/javascript/node_modules/@babel/runtime/helpers/extends.js

@@ -1,19 +0,0 @@
-function _extends() {
-  module.exports = _extends = Object.assign || function (target) {
-    for (var i = 1; i < arguments.length; i++) {
-      var source = arguments[i];
-
-      for (var key in source) {
-        if (Object.prototype.hasOwnProperty.call(source, key)) {
-          target[key] = source[key];
-        }
-      }
-    }
-
-    return target;
-  };
-
-  return _extends.apply(this, arguments);
-}
-
-module.exports = _extends;