removed unused variable

Author: Prottay Das

PWGLF/Tasks/Strangeness/lambdak0seff.cxx

@@ -432,10 +432,8 @@ struct lambdak0seff {
         int lambdacounter = 0;
         int antilambdacounter = 0;
         int k0scounter = 0;
-        int counter = 0;
-
+     
         for (const auto& kCurrentDaughter : kDaughters) {
-          counter += 1;
           if (std::abs(kCurrentDaughter.pdgCode()) != PDG_t::kProton && std::abs(kCurrentDaughter.pdgCode()) != PDG_t::kPiPlus) {
             continue;
           }