Please archive/remove
          http://l10n.gnome.org/module/gnome-volume-manager/

After a conversation with the two maintainers (fejj and rml) via private email, rml answered:

"Yes, given g-v-m hasn't seen a change in three years, it definitely qualifies as unmaintained.
My only concern would be if some GNOME releases or distributions still use it. I think the latest releases use gvfs for everything. If no recent release or distributions are using it, then I am all for all of your suggestions."

After I answered
        "Debian Squeeze 6.0 (recent stable) ships gnome-volume-manager 2.24.1
        with one small preferences patch.
        Mageia Cauldron, Mandriva Cooker, Fedora 16/17, Gentoo, Ubuntu 11.10,
        openSUSE:Factory and Freshports.org (FreeBSD) seem to not list/ship it."

rml answered:
"Your original proposal sounds good to me, then."