Revert "Commit updated Javascript packages"

This reverts commit a88734348a.

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

@@ -1,37 +0,0 @@
-function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
-  try {
-    var info = gen[key](arg);
-    var value = info.value;
-  } catch (error) {
-    reject(error);
-    return;
-  }
-
-  if (info.done) {
-    resolve(value);
-  } else {
-    Promise.resolve(value).then(_next, _throw);
-  }
-}
-
-function _asyncToGenerator(fn) {
-  return function () {
-    var self = this,
-        args = arguments;
-    return new Promise(function (resolve, reject) {
-      var gen = fn.apply(self, args);
-
-      function _next(value) {
-        asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value);
-      }
-
-      function _throw(err) {
-        asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err);
-      }
-
-      _next(undefined);
-    });
-  };
-}
-
-module.exports = _asyncToGenerator;