Remove OBSBasicSettings::VideoChangedRestart

The function `OBSBasicSettings::VideoChangedRestart` was never called,
hence remove it.

UI/window-basic-settings.cpp

@@ -4444,16 +4444,6 @@ void RestrictResetBitrates(initializer_list<QComboBox *> boxes, int maxbitrate)
 	}
 }
 
-void OBSBasicSettings::VideoChangedRestart()
-{
-	if (!loading) {
-		videoChanged = true;
-		ui->videoMsg->setText(QTStr("Basic.Settings.ProgramRestart"));
-		sender()->setProperty("changed", QVariant(true));
-		EnableApplyButton(true);
-	}
-}
-
 void OBSBasicSettings::AdvancedChangedRestart()
 {
 	if (!loading) {

UI/window-basic-settings.hpp

@@ -425,7 +425,6 @@ private slots:
 	void Stream1Changed();
 	void VideoChanged();
 	void VideoChangedResolution();
-	void VideoChangedRestart();
 	void HotkeysChanged();
 	bool ScanDuplicateHotkeys(QFormLayout *layout);
 	void ReloadHotkeys(obs_hotkey_id ignoreKey = OBS_INVALID_HOTKEY_ID);