[wayland] Drop wl_shell requirement
wl_shell
is a deprecated protocol, compositors like Wayfire don't provide it anymore. Cogl errors out when it's not present. Though when used in e.g. GNOME Maps, cogl doesn't actually need it.
wl_shell
is a deprecated protocol, compositors like Wayfire don't provide it anymore. Cogl errors out when it's not present. Though when used in e.g. GNOME Maps, cogl doesn't actually need it.