remove unused

Author: jesgum

ALICE3/TableProducer/OTF/onTheFlyDecayer.cxx

@@ -79,7 +79,6 @@ struct OnTheFlyDecayer {
   o2::upgrade::Decayer decayer;
   Service<o2::framework::O2DatabasePDG> pdgDB;
   HistogramRegistry histos{"histos", {}, OutputObjHandlingPolicy::AnalysisObject};
-  std::vector<std::vector<int>> mcParticlesGrouped;
 
   Configurable<int> seed{"seed", 0, "Set seed for particle decayer"};
   Configurable<float> magneticField{"magneticField", 20., "Magnetic field (kG)"};