docs: def delete_role_perm(role_id, perm_id,**kwargs):
      """
          Remove a permission from a role
      """
      #check_perm(kwargs.get('user_id'), 'edit_perm')
      _get_perm(perm_id)
      _get_role(role_id)
  
      try:
          roleperm_i = db.DBSession.query(RolePerm).filter(RolePerm.role_id==role_id, RolePerm.perm_id==perm_id).one()
          db.DBSession.delete(roleperm_i)
      except NoResultFound:
          raise ResourceNotFoundError("Role Perm does not exist")
  
      return 'OK'