[PWGEM/Dilepton] remove unnecessary histogram (#10827)

Author: dsekihat

PWGEM/Dilepton/Tasks/matchingMFT.cxx

@@ -146,7 +146,6 @@ struct matchingMFT {
     fRegistry.add("MFTMCHMID/primary/correct/hPt", "pT;p_{T} (GeV/c)", kTH1F, {{100, 0.0f, 10}}, false);
     fRegistry.add("MFTMCHMID/primary/correct/hEtaPhi", "#eta vs. #varphi;#varphi (rad.);#eta", kTH2F, {{180, 0, 2 * M_PI}, {100, -6.f, -1.f}}, false);
     fRegistry.add("MFTMCHMID/primary/correct/hEtaPhi_MatchedMCHMID", "#eta vs. #varphi;#varphi (rad.);#eta", kTH2F, {{180, 0, 2 * M_PI}, {100, -6.f, -1.f}}, false);
-    fRegistry.add("MFTMCHMID/primary/correct/hDeltaEtaDeltaPhi", "#Delta#eta vs. #Delta#varphi;#Delta#varphi = #varphi_{sa} - #varphi_{gl} (rad.);#Delta#eta = #eta_{sa} - #eta_{gl}", kTH2F, {{180, -M_PI, M_PI}, {400, -2.f, 2.f}}, false);
     fRegistry.add("MFTMCHMID/primary/correct/hDiffCollId", "difference in collision index;collisionId_{TTCA} - collisionId_{MP}", kTH1F, {{41, -20.5, +20.5}}, false);
     fRegistry.add("MFTMCHMID/primary/correct/hSign", "sign;sign", kTH1F, {{3, -1.5, +1.5}}, false);
     fRegistry.add("MFTMCHMID/primary/correct/hNclusters", "Nclusters;Nclusters", kTH1F, {{21, -0.5f, 20.5}}, false);
@@ -283,17 +282,12 @@ struct matchingMFT {
       return;
     }
 
-    float deta = etaMatchedMCHMID - eta;
-    float dphi = phiMatchedMCHMID - phi;
-    o2::math_utils::bringToPMPi(dphi);
-
     fRegistry.fill(HIST("hMuonType"), fwdtrack.trackType());
     if (isPrimary) {
       if (isMatched) {
         fRegistry.fill(HIST("MFTMCHMID/primary/correct/hPt"), pt);
         fRegistry.fill(HIST("MFTMCHMID/primary/correct/hEtaPhi"), phi, eta);
         fRegistry.fill(HIST("MFTMCHMID/primary/correct/hEtaPhi_MatchedMCHMID"), phiMatchedMCHMID, etaMatchedMCHMID);
-        fRegistry.fill(HIST("MFTMCHMID/primary/correct/hDeltaEtaDeltaPhi"), dphi, deta);
         fRegistry.fill(HIST("MFTMCHMID/primary/correct/hDiffCollId"), collision.globalIndex() - fwdtrack.collisionId());
         fRegistry.fill(HIST("MFTMCHMID/primary/correct/hSign"), fwdtrack.sign());
         fRegistry.fill(HIST("MFTMCHMID/primary/correct/hNclusters"), fwdtrack.nClusters());
@@ -322,7 +316,6 @@ struct matchingMFT {
         fRegistry.fill(HIST("MFTMCHMID/primary/wrong/hPt"), pt);
         fRegistry.fill(HIST("MFTMCHMID/primary/wrong/hEtaPhi"), phi, eta);
         fRegistry.fill(HIST("MFTMCHMID/primary/wrong/hEtaPhi_MatchedMCHMID"), phiMatchedMCHMID, etaMatchedMCHMID);
-        fRegistry.fill(HIST("MFTMCHMID/primary/wrong/hDeltaEtaDeltaPhi"), dphi, deta);
         fRegistry.fill(HIST("MFTMCHMID/primary/wrong/hDiffCollId"), collision.globalIndex() - fwdtrack.collisionId());
         fRegistry.fill(HIST("MFTMCHMID/primary/wrong/hSign"), fwdtrack.sign());
         fRegistry.fill(HIST("MFTMCHMID/primary/wrong/hNclusters"), fwdtrack.nClusters());
@@ -353,7 +346,6 @@ struct matchingMFT {
         fRegistry.fill(HIST("MFTMCHMID/secondary/correct/hPt"), pt);
         fRegistry.fill(HIST("MFTMCHMID/secondary/correct/hEtaPhi"), phi, eta);
         fRegistry.fill(HIST("MFTMCHMID/secondary/correct/hEtaPhi_MatchedMCHMID"), phiMatchedMCHMID, etaMatchedMCHMID);
-        fRegistry.fill(HIST("MFTMCHMID/secondary/correct/hDeltaEtaDeltaPhi"), dphi, deta);
         fRegistry.fill(HIST("MFTMCHMID/secondary/correct/hDiffCollId"), collision.globalIndex() - fwdtrack.collisionId());
         fRegistry.fill(HIST("MFTMCHMID/secondary/correct/hSign"), fwdtrack.sign());
         fRegistry.fill(HIST("MFTMCHMID/secondary/correct/hNclusters"), fwdtrack.nClusters());
@@ -382,7 +374,6 @@ struct matchingMFT {
         fRegistry.fill(HIST("MFTMCHMID/secondary/wrong/hPt"), pt);
         fRegistry.fill(HIST("MFTMCHMID/secondary/wrong/hEtaPhi"), phi, eta);
         fRegistry.fill(HIST("MFTMCHMID/secondary/wrong/hEtaPhi_MatchedMCHMID"), phiMatchedMCHMID, etaMatchedMCHMID);
-        fRegistry.fill(HIST("MFTMCHMID/secondary/wrong/hDeltaEtaDeltaPhi"), dphi, deta);
         fRegistry.fill(HIST("MFTMCHMID/secondary/wrong/hDiffCollId"), collision.globalIndex() - fwdtrack.collisionId());
         fRegistry.fill(HIST("MFTMCHMID/secondary/wrong/hSign"), fwdtrack.sign());
         fRegistry.fill(HIST("MFTMCHMID/secondary/wrong/hNclusters"), fwdtrack.nClusters());