def delete(self, ref_or_id, requester_user):
        """
        Delete an action alias.

        Handles requests:
            DELETE /actionalias/1
        """
        action_alias_db = self._get_by_ref_or_id(ref_or_id=ref_or_id)
        LOG.debug(
            "DELETE /actionalias/ lookup with id=%s found object: %s",
            ref_or_id,
            action_alias_db,
        )

        permission_type = PermissionType.ACTION_ALIAS_DELETE
        rbac_utils = get_rbac_backend().get_utils_class()
        rbac_utils.assert_user_has_resource_db_permission(
            user_db=requester_user,
            resource_db=action_alias_db,
            permission_type=permission_type,
        )

        try:
            ActionAlias.delete(action_alias_db)
        except Exception as e:
            LOG.exception(
                'Database delete encountered exception during delete of id="%s".',
                ref_or_id,
            )
            abort(http_client.INTERNAL_SERVER_ERROR, six.text_type(e))
            return

        extra = {"action_alias_db": action_alias_db}
        LOG.audit(
            "Action alias deleted. ActionAlias.id=%s." % (action_alias_db.id),
            extra=extra,
        )

        return Response(status=http_client.NO_CONTENT)

        Delete an action alias.

        Handles requests:
            DELETE /actionalias/1
        
st2api/st2api/controllers/v1/actionalias.py