[galaxy-dev] cleanup of database/pbs folder

Hej Galaxy-admins, While thinking of backing up the galaxy dir I noticed the database/pbs directory on our local server contains several gigabytes of data (all *.o, *.e and galaxy_*.sh scripts). I use the cleanup scripts to remove deleted datasets, but shouldn't this directory also not be cleaned once in a while? Is this possible with the cleanup scripts? Thanks for sharing you experience or view on it! Mattias