How to remove PSC Agency Business License Inquiry privilege from inherited role in a Custom role?

It is required to eliminate some privileges from some inherited roles due to the fact that it consumes licensing of non-contracted products. The customization of the role was done, the roles that are not part of the expected functions were eliminated, and when trying to eliminate some privileges it is observed that the delete option is not available or it throws a warning that You can remove only roles inherited by the current role. Is there anyway that this can be achieved.