X11DRV_XRandR_Cleanup() is not used

[Francois Gouget]

dlls/x11drv/xrandr.c defines a X11DRV_XRandR_Cleanup() function but it 
is not actually used anywhere. If I remember correctly past wine-devel 
emails, restoring the right XRandR mode when an application exits can be 
tricky (especially in case of a crash). So maybe this is why the 
function is not called, though I'm not sure it's even related.

So my question is: should this function be removed? Or should I simply 
send a patch calling it from x11drv_main.c:process_detach(), enclosed 
with the appropriate SONAME_LIBXRANDR?