[horde] Drop or clean unused tables in Horde DB after migration

[Steffen]

Some time ago I have migrated my Horde installation to H5 incl. several NG 
shares tables.

Is there some database "cleanup" script to drop or empty unused tables? I 
have only found horde-db-migrate and horde-db-migrate-component, that deal 
with the database.

My migration is a while back now, so I do not want to return to the old 
tables and I would like to get rid of the old data.

In my case, any tables that have corresponding *shareng* table seem to be 
old and could be purged:

kronolith_shares
kronolith_shares_users
mnemo_shares
mnemo_shares_users
nag_shares
nag_shares_users
turba_shares
turba_shares_users

-- 
Steffen