Just setting `download-updates=false` seems not to be enough any
more, we get update notifications in live images currently. This
should fix that and also disable the Updates pane on GNOME
Software in the live environment, which is a nice improvement.
https://gitlab.gnome.org/GNOME/gnome-software/-/issues/1683#note_1408750
Signed-off-by: Adam Williamson <awilliam@redhat.com>
Remove additional scanning packages brought in by gnome.
Un-blacklist some packages now needed by libvirt.
Signed-off-by: Rich Mattes <richmattes@gmail.com>