skulpt imports should be with the python version

Author: runestonetest

runestone/activecode/js/activecode_js.js

@@ -1,10 +1,4 @@
 import { ActiveCode } from "./activecode.js";
-import "./skulpt.min.js";
-import "./skulpt-stdlib.js";
-// Used by Skulpt.
-import embed from "vega-embed";
-// Adapt for use outside webpack -- see https://github.com/vega/vega-embed.
-window.vegaEmbed = embed;
 
 export default class JSActiveCode extends ActiveCode {
     constructor(opts) {