The T103586 fix effectively ran the wl_surface_listener.leave callback
to as WLROOTS based compositors doesn't run them. Remove the workaround
since it's an error in WLROOTS to be fixed upstream.
Temporarily using the wrong window scale when disconnecting a monitor
on configurations that use different DPI per monitor is a minor enough
issue that I don't think it makes sense to workaround in GHOST.
ed66321996