DPG: comment out unused variables to avoid warnings. (#315)

Co-authored-by: Mattia Faggin <mfaggin@cern.ch>

Author: mfaggin

DPG/Tasks/qaImpPar.cxx

@@ -133,7 +133,7 @@ struct QaImpactPar {
   {
     //o2::dataformats::DCA dca;
     // FIXME: get this from CCDB
-    constexpr float magneticField{5.0};      // in kG
+    //constexpr float magneticField{5.0};      // in kG
     constexpr float toMicrometers = 10000.f; // Conversion from [cm] to [mum]
     const bool isPIDPionApplied = ((nSigmaTPCPionMin > -10.001 && nSigmaTPCPionMax < 10.001) || (nSigmaTOFPionMin > -10.001 && nSigmaTOFPionMax < 10.001));
     const bool isPIDKaonApplied = ((nSigmaTPCKaonMin > -10.001 && nSigmaTPCKaonMax < 10.001) || (nSigmaTOFKaonMin > -10.001 && nSigmaTOFKaonMax < 10.001));
@@ -280,7 +280,7 @@ struct QaImpactParMC {
   {
     //o2::dataformats::DCA dca;
     // FIXME: get this from CCDB
-    constexpr float magneticField{5.0};      // in kG
+    //constexpr float magneticField{5.0};      // in kG
     constexpr float toMicrometers = 10000.f; // Conversion from [cm] to [mum]
 
     /// trigger selection
@@ -316,7 +316,7 @@ struct QaImpactParMC {
     /// loop over tracks
     float impParRPhi = -999.f;
     float impParZ = -999.f;
-    o2::base::Propagator::MatCorrType matCorr = o2::base::Propagator::MatCorrType::USEMatCorrLUT;
+    //o2::base::Propagator::MatCorrType matCorr = o2::base::Propagator::MatCorrType::USEMatCorrLUT;
     if (!o2::base::GeometryManager::isGeometryLoaded()) {
       o2::base::GeometryManager::isGeometryLoaded();
       o2::base::GeometryManager::loadGeometry();