Revert of [es6] Fix scoping for default parameters in arrow functions

test/mjsunit/harmony/regress/regress-4395.js

Index: test/mjsunit/harmony/regress/regress-4395.js
diff --git a/test/mjsunit/harmony/regress/regress-4395.js b/test/mjsunit/harmony/regress/regress-4395.js
deleted file mode 100644
index 09f5bfb733e0679989cda78e40d57868130c4431..0000000000000000000000000000000000000000
--- a/test/mjsunit/harmony/regress/regress-4395.js
+++ /dev/null
@@ -1,69 +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-destructuring --harmony-default-parameters
-
-(function testExpressionTypes() {
-  "use strict";
-  ((x, y = x) => assertEquals(42, y))(42);
-
-  ((x, y = (x)) => assertEquals(42, y))(42);
-  ((x, y = `${x}`) => assertEquals("42", y))(42);
-  ((x, y = x = x + 1) => assertEquals(43, y))(42);
-  ((x, y = x()) => assertEquals(42, y))(() => 42);
-  ((x, y = new x()) => assertEquals(42, y.z))(function() { this.z = 42 });
-  ((x, y = -x) => assertEquals(-42, y))(42);
-  ((x, y = ++x) => assertEquals(43, y))(42);
-  ((x, y = x === 42) => assertTrue(y))(42);
-  ((x, y = (x == 42 ? x : 0)) => assertEquals(42, y))(42);
-
-  ((x, y = function() { return x }) => assertEquals(42, y()))(42);
-  ((x, y = () => x) => assertEquals(42, y()))(42);
-
-  // Literals
-  ((x, y = {z: x}) => assertEquals(42, y.z))(42);
-  ((x, y = {[x]: x}) => assertEquals(42, y[42]))(42);
-  ((x, y = [x]) => assertEquals(42, y[0]))(42);
-  ((x, y = [...x]) => assertEquals(42, y[0]))([42]);
-
-  ((x, y = class {
-    static [x]() { return x }
-  }) => assertEquals(42, y[42]()))(42);
-  ((x, y = (new class {
-    z() { return x }
-  })) => assertEquals(42, y.z()))(42);
-
-  ((x, y = (new class Y {
-    static [x]() { return x }
-    z() { return Y[42]() }
-  })) => assertEquals(42, y.z()))(42);
-
-  ((x, y = (new class {
-    constructor() { this.z = x }
-  })) => assertEquals(42, y.z))(42);
-  ((x, y = (new class Y {
-    constructor() { this.z = x }
-  })) => assertEquals(42, y.z))(42);
-
-  ((x, y = (new class extends x {
-  })) => assertEquals(42, y.z()))(class { z() { return 42 } });
-
-  // Defaults inside destructuring
-  ((x, {y = x}) => assertEquals(42, y))(42, {});
-  ((x, [y = x]) => assertEquals(42, y))(42, []);
-})();
-
-(function testMultiScopeCapture() {
-  "use strict";
-  var x = 1;
-  {
-    let y = 2;
-    ((x, y, a = x, b = y) => {
-      assertEquals(3, x);
-      assertEquals(3, a);
-      assertEquals(4, y);
-      assertEquals(4, b);
-    })(3, 4);
-  }
-})();