Remove clhep dependency

This merge request removes the external linking to CLHEP package, and substitute it with the internal Geant4 CLHEP built version. This will avoid hidden versions conflicts that may arise.

GeoModel2G4/CMakeLists.txt

@@ -9,7 +9,7 @@ project( "GeoModel2G4" VERSION 1.0.0 LANGUAGES CXX )
 
 # External dependencies:
 find_package( Geant4 REQUIRED )
-find_package( CLHEP )
+
 # GeoModel dependencies
 find_package( GeoModelCore 3.2.0 REQUIRED )
 
@@ -44,8 +44,8 @@ include(${Geant4_USE_FILE})
 add_library( GeoModel2G4 SHARED ${HEADERS} ${SOURCES} )
 target_link_libraries( GeoModel2G4
   PUBLIC  ${GEANT4_LIBRARIES}
-  PRIVATE ${CLHEP_LIBRARIES} GeoMaterial2G4 GeoSpecialShapes)
-target_include_directories( GeoModel2G4 SYSTEM PUBLIC ${GEANT4_INCLUDE_DIRS} PRIVATE ${CLHEP_INCLUDE_DIRS} ${GeoModelCore_INCLUDE_DIRS} )
+  PRIVATE GeoMaterial2G4 GeoSpecialShapes)
+target_include_directories( GeoModel2G4 SYSTEM PUBLIC ${GEANT4_INCLUDE_DIRS} PRIVATE ${GeoModelCore_INCLUDE_DIRS} )
 target_include_directories( GeoModel2G4 PUBLIC
    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
    $<INSTALL_INTERFACE:include> )