Remove spurious descent.cfg

This does not need to be in the repository, and was only ever touched by
automated bulk changes.

d2x-rebirth/main/descent.cfg

@@ -1,22 +0,0 @@
-/*
- * This file is part of the DXX-Rebirth project <https://www.dxx-rebirth.com/>.
- * It is copyright by its individual contributors, as recorded in the
- * project's Git history.  See COPYING.txt at the top level for license
- * terms and a link to the Git history.
- */
-DigiVolume=8
-MidiVolume=8
-RedbookEnabled=1
-RedbookVolume=8
-StereoReverse=0
-GammaLevel=0
-DetailLevel=4
-JoystickMin=0,0,0,0
-JoystickCen=0,0,0,0
-JoystickMax=0,0,0,0
-LastPlayer=i
-LastMission=
-VR_type=0
-VR_resolution=0
-VR_tracking=0
-MovieHires=1