Allow lexically declared "arguments" in function scope in sloppy mode.

test/mjsunit/bugs/bug-4577.js

Index: test/mjsunit/bugs/bug-4577.js
diff --git a/test/mjsunit/bugs/bug-4577.js b/test/mjsunit/bugs/bug-4577.js
deleted file mode 100644
index de2f843965de8f0da6244334e722194a4353008f..0000000000000000000000000000000000000000
--- a/test/mjsunit/bugs/bug-4577.js
+++ /dev/null
@@ -1,13 +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.
-
-function f(...arguments) {
-  return Array.isArray(arguments);
-}
-assertTrue(f());
-
-function g({arguments}) {
-  return arguments === 42;
-}
-assertTrue(g({arguments: 42}));