Revert "Cache the scripts on disk, in attempt to increase perfrmance, may need to revisit this"

This reverts commit 4a335dc936.

worker.ts

@@ -8,7 +8,7 @@ const States = Object.freeze({
 });
 
 self.onmessage = async (e) => {
-  const { filePath, request, environment, name } = e.data;
+  const { code, request, environment, name } = e.data;
   const logs: any[] = [];
   const startTime = performance.now();
 
@@ -52,7 +52,15 @@ self.onmessage = async (e) => {
         status
       );
 
-    const userModule = await import(filePath);
+    let userModule = moduleCache.get(code);
+    if (!userModule) {
+      // Use a data URL to import the user's code as an ES module.
+      const dataUrl = `data:text/javascript;base64,${btoa(
+        unescape(encodeURIComponent(code))
+      )}`;
+      userModule = await import(dataUrl);
+      moduleCache.set(code, userModule);
+    }
 
     if (typeof userModule.default !== "function") {
       throw new Error(