GNOME 3.30 Mutter Relieves Wayland Code From Depending Upon X11/XWayland

While GNOME's Wayland support has been in great shape with the Mutter compositor, it has depended upon X11/XWayland code even when starting with pure Wayland support. That's now changing and there is also now the optional "--no-x11" flag for starting the compositor without X11 support...