Qt: Initial hotkey implementation

src/duckstation-qt/portsettingswidget.h

@@ -45,33 +45,3 @@ private:
 
   std::array<PortSettingsUI, 2> m_port_ui = {};
 };
-
-class InputButtonBindingWidget : public QPushButton
-{
-  Q_OBJECT
-
-public:
-  InputButtonBindingWidget(QtHostInterface* host_interface, QString setting_name, ControllerType controller_type,
-                           QWidget* parent);
-  ~InputButtonBindingWidget();
-
-protected:
-  void keyPressEvent(QKeyEvent* event) override;
-  void keyReleaseEvent(QKeyEvent* event) override;
-  
-private Q_SLOTS:
-  void onPressed();
-  void onInputListenTimerTimeout();
-
-private:
-  bool isListeningForInput() const { return m_input_listen_timer != nullptr; }
-  void startListeningForInput();
-  void stopListeningForInput();
-
-  QtHostInterface* m_host_interface;
-  QString m_setting_name;
-  QString m_current_binding_value;
-  ControllerType m_controller_type;
-  QTimer* m_input_listen_timer = nullptr;
-  u32 m_input_listen_remaining_seconds = 0;
-};