Revert "Merge branch 'master' into 'dev'"

This reverts merge request !17

src/suyu/about_dialog.h

@@ -1,22 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2018 suyu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#pragma once
-
-#include <memory>
-#include <QDialog>
-
-namespace Ui {
-class AboutDialog;
-}
-
-class AboutDialog : public QDialog {
-    Q_OBJECT
-
-public:
-    explicit AboutDialog(QWidget* parent);
-    ~AboutDialog() override;
-
-private:
-    std::unique_ptr<Ui::AboutDialog> ui;
-};