Chazza [1] filed a deletion request for gnome-icon-theme-xfce [2]:
Xfce now looks for freedesktop.org icon names for the mail reader launcher and action buttons so this package is no longer required.
Mail reader: https://git.xfce.org/xfce/exo/commit/?id=29474fe37267266e785511808ff2586bd19...
Action buttons: https://bugzilla.xfce.org/show_bug.cgi?id=11513
[1] https://aur.archlinux.org/account/Chazza/ [2] https://aur.archlinux.org/pkgbase/gnome-icon-theme-xfce/
Request #10663 has been accepted by Alad [1].
aur-requests@lists.archlinux.org