How to purge non RAC model categories?

[Duncan Lithgow]

I'm trying to tidy up in our RAC Template and I noticed a few Model Categories which I don't think are meant to be part of RAC but belong to Structure and MEP. Is it possible to get rid of them?

87763

[Alfredo Medina]

No. Not from the Project Browser. You can purge existing families, but not the items of the tree structure.