Undo: Still relevant?

[Christian Neumair <chris gnome-de org>]

http://bugzilla.gnome.org/show_bug.cgi?id=43515 was closed some time
ago. The codebase still contains files exclusively dealing with undo:

        libnautilus/nautilus-undo-private.h
        libnautilus/nautilus-undo-transaction.c
        libnautilus/nautilus-undo-transaction.h
        libnautilus/nautilus-undo.c
        libnautilus/nautilus-undo.h
        libnautilus/nautilus-distributed-undo-stubs.c
        libnautilus/nautilus-distributed-undo-skels.c
        libnautilus/nautilus-distributed-undo-common.c
        libnautilus/nautilus-distributed-undo.h
        libnautilus-private/nautilus-undo-context.c
        libnautilus-private/nautilus-undo-context.h
        libnautilus-private/nautilus-undo-manager.c
        libnautilus-private/nautilus-undo-manager.h
        libnautilus-private/nautilus-undo-signal-handlers.c
        libnautilus-private/nautilus-undo-signal-handlers.h

nautilus-shell-ui.xml only contains a commented out undo action
referring to the bug report mentioned above.
Is it planned to reimplement undo support? What actions ought to be
undoable, anyway?

regs,
 Chris