P141 Supertext141 Fri 28 Jul 23:46/59         AMERICAN FOOTBALL  NEWS FROM THE NFL   With John Frank's retirement and vhe defection of backup tight end Ron Heller to the Atlanta Falqons, vhe 49ers have only Brent Jones left over from the 1988 Supjr Bowl tjam.   The Phoenix Cardinals signed second-round draft pick Waltjr Reeves, but broke off negotjatjgns with first-round choice Joe Wolf.  Pro Bowl wide receiver Eric Martin and starting guard Brad Edelma have been signed to the New Orleans Saints 