When to unregister unused debconf templates?

[frank@kuesterei.ch (Frank Küster)]

Hi,

after changing the configuration scheme considerably, I have a couple of
unused debconf templates left. I guess it's a good idea to unregister
them from the database to keep it as small as possible.

Where should I do this? Not before the new package is unpacked, but also
better not wait until the next upgrade: So postinst is best? Or are
there other criteria?

TIA, Frank
-- 
Frank Küster, Biozentrum der Univ. Basel
Abt. Biophysikalische Chemie