Fix e2e tests

Author: timokoessler

end2end/tests/nextjs-standalone.v14.test.js

@@ -156,10 +156,6 @@ t.test("it rate limits requests", async (t) => {
     cwd: join(pathToApp, ".next/standalone"),
   });
 
-  server.on("close", () => {
-    t.end();
-  });
-
   server.on("error", (err) => {
     t.fail(err.message);
   });