'Delete an ACL
@param group: the ID or UID of the auth_group this ACL applies to
@param c: the controller
@param f: the function
@param t: the tablename
@param record: the record (as ID or Row with ID)
@param entity: restrict this ACL to the records owned by this
entity (pe_id), specify "any" for any entity'

def delete_acl(self, group, c=None, f=None, t=None, record=None, entity=None):

    return self.update_acl(group, c=c, f=f, t=t, record=record, entity=entity, delete=True)
