Deletes/withdraws Flow Specification route from VRF identified
    by *route_dist*.

def del_flowspec_local(flowspec_family, route_dist, rules):
    """Deletes/withdraws Flow Specification route from VRF identified
    by *route_dist*.
    """
    try:
        tm = CORE_MANAGER.get_core_service().table_manager
        tm.update_flowspec_vrf_table(
            flowspec_family=flowspec_family, route_dist=route_dist,
            rules=rules, is_withdraw=True)

        # Send success response.
        return [{FLOWSPEC_FAMILY: flowspec_family,
                 ROUTE_DISTINGUISHER: route_dist,
                 FLOWSPEC_RULES: rules}]

    except BgpCoreError as e:
        raise PrefixError(desc=e)