Remove mojo/tools/, not needed in chromium

mojo/tools/package_manager/unpacker.h

-// 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.
-
-#ifndef MOJO_TOOLS_PACKAGE_MANAGER_UNPACKER_H_
-#define MOJO_TOOLS_PACKAGE_MANAGER_UNPACKER_H_
-
-#include "base/files/file_path.h"
-#include "base/memory/ref_counted.h"
-#include "mojo/public/cpp/system/macros.h"
-
-namespace mojo {
-
-// Unzips a package into a temporary folder. The temporary folder will be
-// deleted when the object is destroyed.
-//
-// In the future, this class would probably manage doing the unzip operation on
-// a background thread.
-class Unpacker {
- public:
-  Unpacker();
-  ~Unpacker();
-
-  // Actually does the unpacking, returns true on success.
-  bool Unpack(const base::FilePath& zip_file);
-
-  // The root directory where the package has been unpacked.
-  const base::FilePath& dir() const { return dir_; }
-
- private:
-  base::FilePath zip_file_;
-
-  base::FilePath dir_;
-
-  MOJO_DISALLOW_COPY_AND_ASSIGN(Unpacker);
-};
-
-}  // namespace mojo
-
-#endif  // MOJO_TOOLS_PACKAGE_MANAGER_UNPACKER_H_