[UI] Delete the now-unused loop_gtk.h

src/xenia/ui/loop_gtk.h

@@ -1,50 +0,0 @@
-/**
- ******************************************************************************
- * Xenia : Xbox 360 Emulator Research Project                                 *
- ******************************************************************************
- * Copyright 2016 Ben Vanik. All rights reserved.                             *
- * Released under the BSD license - see LICENSE in the root for more details. *
- ******************************************************************************
- */
-
-#ifndef XENIA_UI_LOOP_GTK_H_
-#define XENIA_UI_LOOP_GTK_H_
-
-#include <list>
-#include <mutex>
-#include <thread>
-
-#include "xenia/base/platform_linux.h"
-#include "xenia/base/threading.h"
-#include "xenia/ui/loop.h"
-
-namespace xe {
-namespace ui {
-
-class GTKWindow;
-
-class GTKLoop : public Loop {
- public:
-  GTKLoop();
-  ~GTKLoop() override;
-
-  bool is_on_loop_thread() override;
-
-  void Post(std::function<void()> fn) override;
-  void PostDelayed(std::function<void()> fn, uint64_t delay_millis) override;
-
-  void Quit() override;
-  void AwaitQuit() override;
-
- private:
-  void ThreadMain();
-
-  std::thread::id thread_id_;
-  std::thread thread_;
-  xe::threading::Fence quit_fence_;
-};
-
-}  // namespace ui
-}  // namespace xe
-
-#endif  // XENIA_UI_LOOP_GTK_H_