trying to delete last admin user makes no sense, because admin with --id 1 cannot be removed:

   # hammer -u admin -p changeme user delete --id 1
    Could not delete the user:
      Forbidden - server refused to process the request
    # hammer -u admin2 -p testing user delete --id 1
    Could not delete the user:
      Can't delete internal admin account

so this test just tries to delete user --id 1