get rid of BTGhostSaver.Tick

[SuraWnd]

in past versions this was used because of a performance issue caused by the array used to store the ghost frames being resized for every frame to be saved

i only skimmed over the new code but this seems to be fixed now (maybe by accident) by setting the length of the array in advance so there shouldnt be a need for queueing frames anymore
in an older version that i had patched this resulted in near instantaneous ghost saves even for hour long ghosts and prevented broken ghosts / server crashes on map change so i thought you might wanna give it a shot