removed obsolate clean up.

src/musrFT.cpp

@@ -1543,13 +1543,5 @@ Int_t main(Int_t argc, Char_t *argv[])
       app.Run(true); // true needed that Run will return after quit so that cleanup works
   }
 
-
-  // cleanup
-  if (histo.size() > 0) {
-    for (UInt_t i=0; i<histo.size(); i++)
-      delete histo[i];
-    histo.clear();
-  }
-
   return PMUSR_SUCCESS;
 }