Remove obsolete 'components/*_load.cxx' files

The '_load.cxx' files are no longer needed to instantiate Gaudi
components.

ForwardDetectors/AFP/AFP_DBTools/src/components/AFP_DBTools_load.cxx

-/*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
-*/
-
-#include "GaudiKernel/LoadFactoryEntries.h"
-
-LOAD_FACTORY_ENTRIES(AFP_DBTools)
-

InnerDetector/InDetDigitization/PixelRadDamDigitization/src/components/PixelRadDamDigitization_load.cxx

-#include "GaudiKernel/LoadFactoryEntries.h"
-
-LOAD_FACTORY_ENTRIES( PixelRadDamDigitization )
-LOAD_FACTORY_ENTRIES( ChargeCollProbSvc )

PhysicsAnalysis/ElectronPhotonID/PhotonEfficiencyCorrection/src/components/PhotonEfficiencyCorrection_load.cxx

-#include "GaudiKernel/LoadFactoryEntries.h"
-LOAD_FACTORY_ENTRIES(PhotonEfficiencyCorrection)

PhysicsAnalysis/ElectronPhotonID/PhotonVertexSelection/src/components/PhotonVertexSelection_load.cxx

-// Gaudi/Athena include(s):
-#include "GaudiKernel/LoadFactoryEntries.h"
-
-// Declare the library to the infrastructure:
-LOAD_FACTORY_ENTRIES(PhotonVertexSelection)

PhysicsAnalysis/JetTagging/JetTagCalibration/src/components/JetTagCalibration_load.cxx

-#include "GaudiKernel/LoadFactoryEntries.h"
-
-LOAD_FACTORY_ENTRIES( JetTagCalibCondAlg )