MuonRPC_Cabling: delete unused ICallBackMuonRPC_Cabling.h

MuonSpectrometer/MuonCablings/MuonRPC_Cabling/MuonRPC_Cabling/ICallBackMuonRPC_Cabling.h

-/*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
-*/
-
-#ifndef ICallBackMuonRPC_Cabling_H
-#define ICallBackMuonRPC_Cabling_H
-#ifndef LVL1_STANDALONE	
-#include "AthenaKernel/IOVSvcDefs.h"	
-class ICallBackMuonRPC_Cabling : virtual public IInterface
-{
-  public:
-  // Trigger roads initialization method
-  virtual StatusCode initTrigRoadsModel(IOVSVC_CALLBACK_ARGS) = 0;
-};
-#endif
-#endif  //ICallBackMuonRPC_Cabling_H