Getting rid of libgksu1.2

[Riku Voipio <riku.voipio@iki.fi>]

Hi,

apparently libgksu1.2 is only needed by gnome-python-extras
(terribly out of date) and gnome-apt (orphaned). For
gnome-python-extras ubuntu has already migrated to libgksu2,
and gnome-apt needs a new upstream author.

background: I'm trying to increase armel/lenny "installable"
count, and parts of gnome are uninstallable because of #474679.
Why armel/lenny doesn't have xbase-clients? because that's now
part of xorg, which isn't migrating to testing anytime soon,
sigh.


-- 
"rm -rf" only sounds scary if you don't have backups