Revert "Commit updated Javascript packages"

This reverts commit a88734348a.

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

@@ -1,7 +0,0 @@
-function _classCallCheck(instance, Constructor) {
-  if (!(instance instanceof Constructor)) {
-    throw new TypeError("Cannot call a class as a function");
-  }
-}
-
-module.exports = _classCallCheck;