Dropped the unused GeoModelG4/GeoModel2G4/original_GeoModel2G4

GeoModelG4/GeoModel2G4/original_GeoModel2G4/CMakeLists.txt

...G4/GeoModel2G4/original_GeoModel2G4/CMakeLists.txt.Athena

GeoModelG4/GeoModel2G4/original_GeoModel2G4/README.md

...riginal_GeoModel2G4/src/ExtParameterisedVolumeBuilder.cxx

.../original_GeoModel2G4/src/ExtParameterisedVolumeBuilder.h

...GeoModel2G4/original_GeoModel2G4/src/GDMLDetectorTool.cxx

...4/GeoModel2G4/original_GeoModel2G4/src/GDMLDetectorTool.h

...del2G4/original_GeoModel2G4/src/Geo2G4AssemblyFactory.cxx

...Model2G4/original_GeoModel2G4/src/Geo2G4AssemblyFactory.h

...Model2G4/original_GeoModel2G4/src/Geo2G4AssemblyTriplet.h

...odel2G4/original_GeoModel2G4/src/Geo2G4AssemblyVolume.cxx

...oModel2G4/original_GeoModel2G4/src/Geo2G4AssemblyVolume.h

...G4/GeoModel2G4/original_GeoModel2G4/src/Geo2G4Builder.cxx

...elG4/GeoModel2G4/original_GeoModel2G4/src/Geo2G4Builder.h

.../GeoModel2G4/original_GeoModel2G4/src/Geo2G4LVFactory.cxx

...G4/GeoModel2G4/original_GeoModel2G4/src/Geo2G4LVFactory.h

...4/original_GeoModel2G4/src/Geo2G4LogicalVolumeFactory.cxx

...2G4/original_GeoModel2G4/src/Geo2G4LogicalVolumeFactory.h

.../original_GeoModel2G4/src/Geo2G4OpticalSurfaceFactory.cxx

...G4/original_GeoModel2G4/src/Geo2G4OpticalSurfaceFactory.h