43401b9d44
GSettings schemas are now compiled at install time, so it is no longer necessary to include the compiled schema in the archive. However the `gnome-extensions pack` command hasn't been adjusted, so that it can still be used to produce valid archives for all supported versions. To not let that code linger forever, error out when building a version where GNOME 44 is the oldest supported release. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2639>