FredBezies [1] filed a deletion request for mate-notification- daemon-1.15-gtk3 [2]:
Obsolete package. The only maintained package is : mate-notification- daemon-dev
[1] https://aur.archlinux.org/account/FredBezies/ [2] https://aur.archlinux.org/pkgbase/mate-notification-daemon-1.15-gtk3/