Mass Delete Orphaned Users -- Windows LSF-9019?

In an effort to clean up Lawson security, we recently ran a simple flow to delete the OS identity from all "ESS only" users who had OS identities tied to their RMID's.  Now we are left with over 1,300 orphaned users in delusers.

Does anyone know a way to clean out these ophaned records in mass?  Manually deleting them via delusers will take forever.

And while I'm on the topic, wth good is the ability to delete os identities via resource update node if it leaves orphaned records??   Grrrr....!!!