Remove --harmony-async-await runtime flag

test/mjsunit/harmony/async-arrow-lexical-arguments.js

Index: test/mjsunit/harmony/async-arrow-lexical-arguments.js
diff --git a/test/mjsunit/harmony/async-arrow-lexical-arguments.js b/test/mjsunit/harmony/async-arrow-lexical-arguments.js
deleted file mode 100644
index 44d38a4275c770a4827e2258bf9ef1faa49061aa..0000000000000000000000000000000000000000
--- a/test/mjsunit/harmony/async-arrow-lexical-arguments.js
+++ /dev/null
@@ -1,42 +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
-
-function assertEqualsAsync(expected, run, msg) {
-  var actual;
-  var hadValue = false;
-  var hadError = false;
-  var promise = run();
-
-  if (typeof promise !== "object" || typeof promise.then !== "function") {
-    throw new MjsUnitAssertionError(
-        "Expected " + run.toString() +
-        " to return a Promise, but it returned " + PrettyPrint(promise));
-  }
-
-  promise.then(function(value) { hadValue = true; actual = value; },
-               function(error) { hadError = true; actual = error; });
-
-  assertFalse(hadValue || hadError);
-
-  %RunMicrotasks();
-
-  if (hadError) throw actual;
-
-  assertTrue(
-      hadValue, "Expected '" + run.toString() + "' to produce a value");
-
-  assertEquals(expected, actual, msg);
-};
-
-assertEqualsAsync("[1,2,3]", () => (function() {
-  return (async () => JSON.stringify([...arguments]))();
-})(1, 2, 3));
-
-assertEqualsAsync("[4,5,6]",
-    () => (function() {
-      return (async () => {
-        return JSON.stringify([...await arguments]) })();
-      })(4, 5, 6));