Removed un-used decks flush, prolong, libX11dummy from sixtrack.s
Removed un-used decks flush, prolong, libX11dummy from sixtrack.s

SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack,SixTrack/SixTrack