mash: Port KeyboardUIMus to mojo:ash; remove sysui.

ash/sysui/main.cc

Index: ash/sysui/main.cc
diff --git a/ash/sysui/main.cc b/ash/sysui/main.cc
deleted file mode 100644
index 3e36f23936ffaa2667ea9c113de5bddc2cecf85c..0000000000000000000000000000000000000000
--- a/ash/sysui/main.cc
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright 2016 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 "ash/sysui/sysui_application.h"
-#include "services/shell/public/c/main.h"
-#include "services/shell/public/cpp/service_runner.h"
-
-MojoResult ServiceMain(MojoHandle service_request_handle) {
-  shell::ServiceRunner runner(new ash::sysui::SysUIApplication);
-  return runner.Run(service_request_handle);
-}