remove empty override

stepmania/src/Screen.cpp

@@ -30,15 +30,6 @@ Screen::~Screen()
 
 }
 
-void Screen::AddChild( Actor* pActor )
-{
-	// add only if the actor is on screen
-//	float fX = pActor->GetX();
-//	float fY = pActor->GetY();
-//	if( SCREEN_LEFT>=fX && fX<=SCREEN_RIGHT && SCREEN_TOP>=fY && fY<=SCREEN_BOTTOM )
-		ActorFrame::AddChild( pActor );
-}
-
 bool Screen::SortMessagesByDelayRemaining(const Screen::QueuedScreenMessage &m1,
 										 const Screen::QueuedScreenMessage &m2)
 {