MarsSeed [1] filed a deletion request for mate-session-manager-gtk2 [2]: Broken, discontinued Gtk2 version from 2017. Fails to build from source. Not useful to keep: extra repo carries the latest, working version of mate-session-manager.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/mate-session-manager-gtk2/
