-Remove R_DrawMaskedColumn and R_DrawMaskedColumnHoriz since they are no longer used.

git-svn-id: http://odamex.net/svn/root/branches/rend32@3936 b0bcef46-2027-0410-bd56-ab726e9a1d04
-Remove test code accidentally committed in r3936.

git-svn-id: http://odamex.net/svn/root/branches/rend32@3937 b0bcef46-2027-0410-bd56-ab726e9a1d04