Remove "note skin for beat range", "beat range revision" stuff.

We still load all note skins for a course in advance, and note skins
are still sent through the weird "attack queue" stuff.

stepmania/src/ScreenGameplay.cpp

@@ -998,7 +998,9 @@ void ScreenGameplay::SetupSong( int iSongIndex )
 			a.sModifiers = po.m_sNoteSkin;
 
 			GAMESTATE->LaunchAttack( pi->GetPlayerStateAndStageStatsIndex(), a );
-			GAMESTATE->m_SongOptions.FromString( a.sModifiers );
+
+			/* Update attack bOn flags. */
+			pi->GetPlayerState()->Update(0);
 		}