Removing unused template type parameter

Author: prchakra

PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackTrackSpherHarMultKtExtended.cxx

@@ -461,8 +461,8 @@ struct femtoUniversePairTaskTrackTrackSpherHarMultKtExtended {
   /// @param parts femtoUniverseParticles table (in case of Monte Carlo joined with FemtoUniverseMCLabels)
   /// @param magFieldTesla magnetic field of the collision
   /// @param multCol multiplicity of the collision
-  template <bool isMC, typename PartitionType, typename PartType, typename MCParticles = std::nullptr_t>
-  void doSameEvent(PartitionType groupPartsOne, PartitionType groupPartsTwo, PartType parts, float magFieldTesla, int multCol, int ContType, bool fillQA, [[maybe_unused]] MCParticles mcParts = nullptr)
+  template <bool isMC, typename PartitionType, typename PartType>
+  void doSameEvent(PartitionType groupPartsOne, PartitionType groupPartsTwo, PartType parts, float magFieldTesla, int multCol, int ContType, bool fillQA)
   {
 
     /// Histogramming same event