Revert "app_shell: Add experimental shellPrivate extension API"

extensions/browser/api/shell_private/shell_private_api_unittest.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "extensions/browser/api/shell_private/shell_private_api.h"
-
-#include "base/memory/scoped_ptr.h"
-#include "base/values.h"
-#include "extensions/browser/api_unittest.h"
-
-namespace extensions {
-
-typedef ApiUnitTest ShellPrivateApiTest;
-
-// Verifies that the printHello function exists and can be called without
-// crashing.
-TEST_F(ShellPrivateApiTest, PrintHello) {
-  scoped_ptr<base::Value> result =
-      RunFunctionAndReturnValue(new ShellPrivatePrintHelloFunction, "[]");
-
-  // Function returns nothing.
-  EXPECT_FALSE(result.get());
-}
-
-}  // namespace extensions