Clean up of TrackToCalo legacy config

Reconstruction/RecoTools/TrackToCalo/python/CaloExtensionBuilderAlgConfig.py

-# Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
-
-def CaloExtensionBuilder(useLRT):
-    import traceback
-    from AthenaCommon.Logging import logging
-    mlog = logging.getLogger('CaloExtensionBuilder')
-
-    try: 
-        from TrkExTools.AtlasExtrapolator import AtlasExtrapolator
-        from TrackToCalo.TrackToCaloConf import Trk__ParticleCaloExtensionTool
-    except Exception:
-        mlog.error("could not import" "TrackToCaloConf.Trk__ParticleCaloExtensionTool")
-        mlog.error("could not import TrkExTools.AtlasExtrapolator")
-        mlog.error (traceback.format_exc())
-    try:
-        from TrackToCalo.TrackToCaloConf import Trk__CaloExtensionBuilderAlg as CaloExtensionBuilderAlg
-    except Exception:
-        mlog.error("could not import TrackToCaloConf.Trk__CaloExtensionBuilderAlg")
-        mlog.error (traceback.format_exc())
-    try:
-        from AthenaCommon.AppMgr import ToolSvc
-    except Exception:
-        mlog.error("could not import ToolSvc")
-        mlog.error (traceback.format_exc())
-    try:
-        from AthenaCommon.AlgSequence import AlgSequence
-    except Exception:
-        mlog.error("could not import AlgSequence")
-        mlog.error (traceback.format_exc())
-
-    topSequence=AlgSequence()
-    
-    theAtlasExtrapolator=AtlasExtrapolator(name = "CaloExtensionBuilderAtlasExtrapolator")
-
-    pcExtensionTool = Trk__ParticleCaloExtensionTool(Extrapolator = theAtlasExtrapolator)
-    ToolSvc += pcExtensionTool
-
-    if (True is useLRT):
-      algName = "CaloExtensionBuilderAlg_LRT"      
-    else:
-      algName = "CaloExtensionBuilderAlg"
-    CaloExtensionBuilderTool = CaloExtensionBuilderAlg(algName, LastCaloExtentionTool = pcExtensionTool)
-
-    if True is useLRT:
-      CaloExtensionBuilderTool.TrkPartContainerName = "InDetLargeD0TrackParticles"
-      CaloExtensionBuilderTool.ParticleCache = "ParticleCaloExtension_LRT"
-
-    ToolSvc += CaloExtensionBuilderTool.LastCaloExtentionTool
-    topSequence += CaloExtensionBuilderTool
-
-    return True