Revert of [d8] bounds-check before getting Shell::Worker internal field

test/mjsunit/regress/regress-4271.js

Index: test/mjsunit/regress/regress-4271.js
diff --git a/test/mjsunit/regress/regress-4271.js b/test/mjsunit/regress/regress-4271.js
deleted file mode 100644
index eff0803a0974977a7af4a6273dd0d6aaa8ea204c..0000000000000000000000000000000000000000
--- a/test/mjsunit/regress/regress-4271.js
+++ /dev/null
@@ -1,24 +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.
-
-// Throw rather than overflow internal field index
-
-assertThrows(function() {
-  Worker.prototype.terminate();
-});
-
-assertThrows(function() {
-  Worker.prototype.getMessage();
-});
-
-assertThrows(function() {
-  Worker.prototype.postMessage({});
-});
-
-// Don't throw for real worker
-
-var worker = new Worker('');
-worker.getMessage();
-worker.postMessage({});
-worker.terminate();