TrigBphysHypo: Fix clang warnings.

clang warnings: unused private class data members.

Trigger/TrigHypothesis/TrigBphysHypo/src/TrigBphysElectronCounter.h

 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
 */
 
 /**************************************************************************
@@ -77,8 +77,6 @@ class TrigBphysElectronCounter: public HLT::AllTEAlgo  {
   
   //Counters
   uint32_t m_countTotalEvents;
-  uint32_t m_countPassedPt;
-  uint32_t m_countPassedIsEM;
   uint32_t m_countPassedEvents;