Remove mcparticles2 references

benchmarks/single/analysis/analyze.cxx

@@ -8,7 +8,7 @@
 int analyze(std::string file)
 {
   // open dataframe
-  ROOT::RDataFrame df("events", file, {"mcparticles2", "GeneratedParticles", "ReconstructedParticles"});
+  ROOT::RDataFrame df("events", file, {"GeneratedParticles", "ReconstructedParticles"});
 
   // count total events
   auto count = df.Count();