UI: Remove unused signals from basic main window

obs/window-basic-main.cpp

@@ -1935,21 +1935,6 @@ void OBSBasic::timerEvent(QTimerEvent *event)
 	}
 }
 
-void OBSBasic::on_action_New_triggered()
-{
-	/* TODO */
-}
-
-void OBSBasic::on_action_Open_triggered()
-{
-	/* TODO */
-}
-
-void OBSBasic::on_action_Save_triggered()
-{
-	/* TODO */
-}
-
 void OBSBasic::on_actionShow_Recordings_triggered()
 {
 	const char *mode = config_get_string(basicConfig, "Output", "Mode");
@@ -2140,11 +2125,6 @@ void OBSBasic::on_actionRemoveScene_triggered()
 		obs_source_remove(source);
 }
 
-void OBSBasic::on_actionSceneProperties_triggered()
-{
-	/* TODO */
-}
-
 void OBSBasic::on_actionSceneUp_triggered()
 {
 	/* TODO */

obs/window-basic-main.hpp

@@ -261,9 +261,6 @@ protected:
 	virtual void timerEvent(QTimerEvent *event) override;
 
 private slots:
-	void on_action_New_triggered();
-	void on_action_Open_triggered();
-	void on_action_Save_triggered();
 	void on_actionShow_Recordings_triggered();
 	void on_actionRemux_triggered();
 	void on_action_Settings_triggered();
@@ -292,7 +289,6 @@ private slots:
 	void on_scenes_customContextMenuRequested(const QPoint &pos);
 	void on_actionAddScene_triggered();
 	void on_actionRemoveScene_triggered();
-	void on_actionSceneProperties_triggered();
 	void on_actionSceneUp_triggered();
 	void on_actionSceneDown_triggered();
 	void on_sources_currentItemChanged(QListWidgetItem *current,