Revert "Commit updated Javascript packages"

This reverts commit a88734348a.

build/javascript/node_modules/autoprefixer/lib/hacks/flex-spec.js

@@ -1,22 +0,0 @@
-"use strict";
-
-/**
- * Return flexbox spec versions by prefix
- */
-module.exports = function (prefix) {
-  var spec;
-
-  if (prefix === '-webkit- 2009' || prefix === '-moz-') {
-    spec = 2009;
-  } else if (prefix === '-ms-') {
-    spec = 2012;
-  } else if (prefix === '-webkit-') {
-    spec = 'final';
-  }
-
-  if (prefix === '-webkit- 2009') {
-    prefix = '-webkit-';
-  }
-
-  return [spec, prefix];
-};