mus: Remove the old client lib.

services/ui/public/cpp/window_manager_delegate.cc

Index: services/ui/public/cpp/window_manager_delegate.cc
diff --git a/services/ui/public/cpp/window_manager_delegate.cc b/services/ui/public/cpp/window_manager_delegate.cc
deleted file mode 100644
index e049b4e140501881d1d0d657415fa9defcbc1b71..0000000000000000000000000000000000000000
--- a/services/ui/public/cpp/window_manager_delegate.cc
+++ /dev/null
@@ -1,15 +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 "services/ui/public/cpp/window_manager_delegate.h"
-
-namespace ui {
-
-mojom::EventResult WindowManagerDelegate::OnAccelerator(
-    uint32_t id,
-    const ui::Event& event) {
-  return mojom::EventResult::UNHANDLED;
-}
-
-}  // namespace ui