MarsSeed [1] filed a deletion request for libappindicator-sharp [2]: Unused, abandoned Gtk2 desktop notification icon support library for C# apps.
Upstream development stopped since 3 years ago. Nothing depends on it. I recommend deletion. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/libappindicator-sharp/
