Revert adding empty `window` object to node sandbox

packages/plugos/environments/node_worker.ts

@@ -39,7 +39,6 @@ let vm = new VM({
     clearTimeout,
     setInterval,
     URL,
-    window: {},
     clearInterval,
     fetch: require(`${nodeModulesPath}/node-fetch`),
     WebSocket: require(`${nodeModulesPath}/ws`),

packages/plugos/environments/sandbox_worker.ts

@@ -11,16 +11,8 @@ let pendingRequests = new Map<
   }
 >();
 
-let isWorker = false;
-
-if (typeof window === "undefined") {
-  // @ts-ignore
-  window = {};
-  isWorker = true;
-}
-
 function workerPostMessage(msg: ControllerMessage) {
-  if (!isWorker && window.parent !== window) {
+  if (typeof window !== "undefined" && window.parent !== window) {
     window.parent.postMessage(msg, "*");
   } else {
     self.postMessage(msg);