PWGEM/Dilepton: remove unnecessary Preslice

Author: dsekihat

PWGEM/Dilepton/TableProducer/skimmerPrimaryMuon.cxx

@@ -381,7 +381,6 @@ struct skimmerPrimaryMuon {
 
   SliceCache cache;
 
-  PresliceUnsorted<aod::FwdTracks> perMFTTrack = o2::aod::fwdtrack::matchMFTTrackId;
   Preslice<aod::FwdTracks> perCollision = o2::aod::fwdtrack::collisionId;
   Preslice<aod::FwdTrackAssoc> fwdtrackIndicesPerCollision = aod::track_association::collisionId;
   PresliceUnsorted<aod::FwdTrackAssoc> fwdtrackIndicesPerFwdTrack = aod::track_association::fwdtrackId;