REMOVE_DYNAMIC_DISPLAY: Remove a dynamic display, killing the server and purging
the display configuration
Supported since: 2.8.0.0
Arguments:  <display to remove>
Answers:
OK <display>
ERROR <err number> <english error description>
0 = Not implemented
1 = Bad display number
100 = Not authenticated
200 = Dynamic Displays not allowed
999 = Unknown error
