Revert of ash/mash: Add a mus-client that sets up ash to provide the system ui for mash.

ash/mus/BUILD.gn

Index: ash/mus/BUILD.gn
diff --git a/ash/mus/BUILD.gn b/ash/mus/BUILD.gn
deleted file mode 100644
index 394ae95d6f490b84ac6305d46b37ed011af318dd..0000000000000000000000000000000000000000
--- a/ash/mus/BUILD.gn
+++ /dev/null
@@ -1,53 +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.
-
-import("//build/config/ui.gni")
-import("//mojo/public/mojo_application.gni")
-import("//mojo/public/tools/bindings/mojom.gni")
-import("//tools/grit/repack.gni")
-
-source_set("lib") {
-  sources = [
-    "shell_delegate_mus.cc",
-    "shell_delegate_mus.h",
-    "stub_context_factory.cc",
-    "stub_context_factory.h",
-    "sysui_application.cc",
-    "sysui_application.h",
-  ]
-
-  deps = [
-    "//ash",
-    "//components/mus/common",
-    "//components/mus/public/cpp",
-    "//components/mus/public/interfaces",
-    "//mash/wm/public/interfaces",
-    "//mojo/common:common_base",
-    "//mojo/converters/geometry",
-    "//mojo/converters/input_events",
-    "//mojo/services/tracing/public/cpp",
-    "//mojo/shell/public/cpp",
-    "//skia",
-    "//ui/aura",
-    "//ui/events",
-    "//ui/gfx",
-    "//ui/gfx/geometry",
-    "//ui/mojo/init",
-    "//ui/platform_window/stub",
-    "//ui/resources",
-    "//ui/strings",
-    "//ui/views",
-    "//ui/views/mus:for_mojo_application",
-  ]
-}
-
-mojo_native_application("mus") {
-  output_name = "ash_sysui"
-  sources = [
-    "main.cc",
-  ]
-  deps = [
-    ":lib",
-  ]
-}