DMXRemoveScreen - detach a back-end screen
Bool DMXRemoveScreen(Display *dpy,
DMXRemoveScreen() detaches the back-end screen from the
DMXRemoveScreen() returns True on success, and False if
there were protocol errors, if the -addremovescreens command-line
option was not specified on the Xdmx(1) command line, if the value of
screen is out of range, or if the back-end screen specified by
screen has already been detached.