Revert "app_shell: Add experimental shellPrivate extension API"

extensions/browser/api/shell_private/shell_private_api.cc

Index: extensions/browser/api/shell_private/shell_private_api.cc
diff --git a/extensions/browser/api/shell_private/shell_private_api.cc b/extensions/browser/api/shell_private/shell_private_api.cc
deleted file mode 100644
index e0313ff1dc1333ab767899376158b80dbae5c431..0000000000000000000000000000000000000000
--- a/extensions/browser/api/shell_private/shell_private_api.cc
+++ /dev/null
@@ -1,21 +0,0 @@
-// 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"
-
-namespace extensions {
-
-ShellPrivatePrintHelloFunction::ShellPrivatePrintHelloFunction() {
-}
-
-ShellPrivatePrintHelloFunction::~ShellPrivatePrintHelloFunction() {
-}
-
-ExtensionFunction::ResponseAction ShellPrivatePrintHelloFunction::Run() {
-  // Warning so it shows in Release and avoids presubmit check for INFO.
-  LOG(WARNING) << "hello";
-  return RespondNow(NoArguments());
-}
-
-}  // namespace extensions