Cleanup: Move mjsunit/regress-*.js into mjsunit/regress/.

test/mjsunit/regress-keyed-store-non-strict-arguments.js

Index: test/mjsunit/regress-keyed-store-non-strict-arguments.js
diff --git a/test/mjsunit/regress-keyed-store-non-strict-arguments.js b/test/mjsunit/regress-keyed-store-non-strict-arguments.js
deleted file mode 100644
index 865d600ad90f1b9c6915659d242e2122ba407008..0000000000000000000000000000000000000000
--- a/test/mjsunit/regress-keyed-store-non-strict-arguments.js
+++ /dev/null
@@ -1,16 +0,0 @@
-// Copyright 2014 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 args(arg) { return arguments; }
-var a = args(false);
-
-(function () {
-  "use strict";
-  a["const" + 0] = 0;
-})();
-
-(function () {
-  "use strict";
-  a[0] = 0;
-})();