MarsSeed [1] filed a deletion request for xfwm4-theme-breeze [2]: EOL Gtk2 based Xfwm4 theme from 2015. Not compatible with the current, Gtk3 based Xfwm4.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/xfwm4-theme-breeze/
