Remove mojo/tools/, not needed in chromium

mojo/tools/package_manager/package_manager.cc

Index: mojo/tools/package_manager/package_manager.cc
diff --git a/mojo/tools/package_manager/package_manager.cc b/mojo/tools/package_manager/package_manager.cc
deleted file mode 100644
index b091f6d5ddea08462bc13c5cd6b2f4ac41f65cc1..0000000000000000000000000000000000000000
--- a/mojo/tools/package_manager/package_manager.cc
+++ /dev/null
@@ -1,12 +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 "mojo/application/application_runner_chromium.h"
-#include "mojo/public/c/system/main.h"
-#include "mojo/tools/package_manager/package_manager_application.h"
-
-MojoResult MojoMain(MojoHandle shell_handle) {
-  mojo::ApplicationRunnerChromium runner(new mojo::PackageManagerApplication);
-  return runner.Run(shell_handle);
-}