Remove --harmony-arrow-functions flag

test/mjsunit/harmony/regress/regress-4160.js

Index: test/mjsunit/harmony/regress/regress-4160.js
diff --git a/test/mjsunit/harmony/regress/regress-4160.js b/test/mjsunit/harmony/regress/regress-4160.js
deleted file mode 100644
index b02daeed40f730419741204684b4f24c00d235ac..0000000000000000000000000000000000000000
--- a/test/mjsunit/harmony/regress/regress-4160.js
+++ /dev/null
@@ -1,29 +0,0 @@
-// Copyright 2015 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-arrow-functions --allow-natives-syntax
-
-(function(x) {
-  (function(x) {
-    var boom = (() => eval(x));
-    assertEquals(23, boom());
-    assertEquals(23, boom());
-    %OptimizeFunctionOnNextCall(boom);
-    assertEquals(23, boom());
-    assertEquals("23", x);
-  })("23");
-  assertEquals("42", x);
-})("42");
-
-(function(x) {
-  (function(x) {
-    var boom = (() => (eval("var x = 66"), x));
-    assertEquals(66, boom());
-    assertEquals(66, boom());
-    %OptimizeFunctionOnNextCall(boom);
-    assertEquals(66, boom());
-    assertEquals("23", x);
-  })("23");
-  assertEquals("42", x);
-})("42");