Revert of Fix async/await memory leak

test/mjsunit/harmony/async-await-loop.js

Index: test/mjsunit/harmony/async-await-loop.js
diff --git a/test/mjsunit/harmony/async-await-loop.js b/test/mjsunit/harmony/async-await-loop.js
deleted file mode 100644
index 7b5f54b0a1ff0bce75582f2f18024cdd25ceeb33..0000000000000000000000000000000000000000
--- a/test/mjsunit/harmony/async-await-loop.js
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2016 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Flags: --harmony-async-await --allow-natives-syntax --max-old-space-size 3
-
-let out;
-
-async function longLoop() {
-  for (let i = 0; i < 8000; i++) await undefined;
-  out = 1;
-}
-
-longLoop();
-
-%RunMicrotasks();
-
-assertEquals(1, out);