community/gnome-themes-extra: drop gtk+-2.0 themes
Fix:
ERROR: unable to select packages:
adwaita-gtk2-theme (no such package):
required by: gnome-themes-extra-3.28-r2[adwaita-gtk2-theme]
Fix:
ERROR: unable to select packages:
adwaita-gtk2-theme (no such package):
required by: gnome-themes-extra-3.28-r2[adwaita-gtk2-theme]