Resolve "Fix Pi0 benchmark"

Closes #37 (closed)

benchmarks/barrel_ecal/scripts/emcal_barrel_pi0_analysis.cxx

@@ -29,7 +29,7 @@ using namespace ROOT::VecOps;
 
 void emcal_barrel_pi0_analysis(const char* input_fname = "sim_output/sim_emcal_barrel_pi0.root")
 {
-  input_fname = "../../../temp_pi0.root";
+  //input_fname = "../../../temp_pi0.root";
   // Setting for graphs
   gROOT->SetStyle("Plain");
   gStyle->SetOptFit(1);