diff --git a/Trigger/TrigAlgorithms/TrigT2CaloCommon/python/CaloDef.py b/Trigger/TrigAlgorithms/TrigT2CaloCommon/python/CaloDef.py
index 7d8f4898cc337d6a0045fcea3d908d9ba58f4f09..f3403daec0d939de342000a0032a49d7b89b47b2 100644
--- a/Trigger/TrigAlgorithms/TrigT2CaloCommon/python/CaloDef.py
+++ b/Trigger/TrigAlgorithms/TrigT2CaloCommon/python/CaloDef.py
@@ -1,33 +1,13 @@
-# Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
+# Copyright (C) 2002-2024 CERN for the benefit of the ATLAS collaboration
 
-from AthenaCommon.CFElements import parOR
 from AthenaConfiguration.ComponentFactory import CompFactory
-from TriggerMenuMT.HLT.Config.MenuComponents import algorithmCAToGlobalWrapper
 from TriggerMenuMT.HLT.CommonSequences.FullScanDefs import caloFSRoI
 from AthenaConfiguration.ComponentAccumulator import ComponentAccumulator
 from AthenaConfiguration.AccumulatorCache import AccumulatorCache
 from TrigT2CaloCommon.TrigCaloDataAccessConfig import trigCaloDataAccessSvcCfg, CaloDataAccessSvcDependencies
 
-########################
-## ALGORITHMS
-# defined as private within this module, so that they can be configured only in functions in this module
-########################
-
-def _algoHLTCaloCell(flags, name="HLTCaloCellMaker", inputEDM='', outputEDM='CellsClusters', RoIMode=True) :
-   if not inputEDM:
-      from HLTSeeding.HLTSeedingConfig import mapThresholdToL1RoICollection
-      inputEDM = mapThresholdToL1RoICollection("FSNOSEED")
-
-   from AthenaCommon.AppMgr import ServiceMgr as svcMgr
-   from TrigCaloRec.TrigCaloRecConfig import HLTCaloCellMaker
-   algo=HLTCaloCellMaker(flags, name, roisKey=inputEDM)
-   #"HLTCaloCellMaker"
-   algo.RoIs=inputEDM
-   algo.TrigDataAccessMT=svcMgr.TrigCaloDataAccessSvc
-   algo.CellsName=outputEDM
-   algo.ExtraInputs |= { ( 'LArBadChannelCont', 'ConditionStore+LArBadChannel'), ( 'LArMCSym', 'ConditionStore+LArMCSym'), ('LArOnOffIdMapping' , 'ConditionStore+LArOnOffIdMap' ), ('LArFebRodMapping'  , 'ConditionStore+LArFebRodMap' ), ('CaloDetDescrManager', 'ConditionStore+CaloDetDescrManager') }
-   return algo
 
+# TODO: delete once HI is migrated to CA
 def _algoHLTHIEventShape(flags,name='HLTEventShapeMaker', inputEDM='CellsClusters', outputEDM='HIEventShape'):
     algo = CompFactory.HIEventShapeMaker(name = name,
                                          InputCellKey = inputEDM,
@@ -37,35 +17,6 @@ def _algoHLTHIEventShape(flags,name='HLTEventShapeMaker', inputEDM='CellsCluster
                                          HIEventShapeFillerTool = CompFactory.HIEventShapeFillerTool())
     return algo
 
-def _algoHLTCaloCellCorrector(name='HLTCaloCellCorrector', inputEDM='CellsClusters', outputEDM='CorrectedCellsClusters', eventShape='HIEventShape'):
-  from TrigCaloRec.TrigCaloRecConf import HLTCaloCellCorrector
-
-  algo = HLTCaloCellCorrector(name)
-  algo.EventShapeCollection = eventShape
-  algo.InputCellKey = inputEDM
-  algo.OutputCellKey = outputEDM
-
-  return algo
-
-def _algoHLTTopoCluster(flags, inputEDM="CellsClusters", algSuffix="") :
-   from TrigCaloRec.TrigCaloRecConfig import hltTopoClusterMakerCfg
-   algo = algorithmCAToGlobalWrapper(hltTopoClusterMakerCfg, flags,
-                                     name="TrigCaloClusterMaker_topo"+algSuffix,
-                                     doLC=False,
-                                     clustersKey="HLT_TopoCaloClusters"+algSuffix,
-                                     cellsKey=inputEDM)[0]
-   return algo
-
-def _algoHLTTopoClusterLC(flags, inputEDM="CellsClusters", algSuffix="") :
-   from TrigCaloRec.TrigCaloRecConfig import hltTopoClusterMakerCfg
-   algo = algorithmCAToGlobalWrapper(hltTopoClusterMakerCfg, flags,
-                                     name="TrigCaloClusterMaker_topo"+algSuffix,
-                                     doLC=True,
-                                     clustersKey="HLT_TopoCaloClusters"+algSuffix,
-                                     cellsKey=inputEDM)[0]
-   return algo
-
-
 #
 # fast calo algorithm (central or forward regions)
 #
@@ -96,7 +47,6 @@ def fastCaloRecoSequenceCfg(flags, inputEDM="", ClustersName="HLT_FastCaloEMClus
     return acc
 
 def fastCaloVDVCfg(name="fastCaloVDV",InViewRoIs="EMCaloRoIs") :
-    from AthenaConfiguration.ComponentAccumulator import ComponentAccumulator
     reco = ComponentAccumulator()
     fastCaloVDV = CompFactory.AthViews.ViewDataVerifier(name)
     fastCaloVDV.DataObjects = {( 'CaloBCIDAverage' , 'StoreGateSvc+CaloBCIDAverage' ),
@@ -104,10 +54,6 @@ def fastCaloVDVCfg(name="fastCaloVDV",InViewRoIs="EMCaloRoIs") :
     reco.addEventAlgo(fastCaloVDV)
     return reco
 
-####################################
-##### SEQUENCES
-####################################
-
 ##################################
 # cluster maker functions
 ###################################
@@ -115,73 +61,7 @@ def fastCaloVDVCfg(name="fastCaloVDV",InViewRoIs="EMCaloRoIs") :
 def clusterFSInputMaker( ):
   """Creates the inputMaker for FS in menu"""
   RoIs = caloFSRoI
-  from AthenaConfiguration.ComponentFactory import CompFactory
   InputMakerAlg = CompFactory.InputMakerForRoI("IMclusterFS", RoIsLink="initialRoI")
   InputMakerAlg.RoITool = CompFactory.ViewCreatorInitialROITool()
   InputMakerAlg.RoIs=RoIs
   return InputMakerAlg
-
-
-def HLTCellMaker(flags,RoIs=caloFSRoI, outputName="CaloCells", algSuffix=""):
-    cellMakerAlgo = _algoHLTCaloCell(flags, name="HLTCaloCellMaker"+algSuffix, inputEDM=RoIs, outputEDM=outputName, RoIMode=True)
-    return cellMakerAlgo
-
-
-def HLTFSCellMakerRecoSequence(flags,RoIs=caloFSRoI):
-    cellMaker = HLTCellMaker(flags, RoIs, outputName="CaloCellsFS", algSuffix="FS")
-    RecoSequence = parOR("ClusterRecoSequenceFS", [cellMaker])
-    return (RecoSequence, cellMaker.CellsName)
-
-
-def HLTFSTopoRecoSequence(flags,RoIs):
-    cellMaker = HLTCellMaker(flags, RoIs, outputName="CaloCellsFS", algSuffix="FS")
-    topoClusterMaker = _algoHLTTopoCluster(flags, inputEDM = cellMaker.CellsName, algSuffix="FS")
-    RecoSequence = parOR("TopoClusterRecoSequenceFS", [cellMaker, topoClusterMaker])
-    return (RecoSequence, topoClusterMaker.CaloClusters)
-
-
-def HLTRoITopoRecoSequence(flags, RoIs, algSuffix=''):
-    import AthenaCommon.CfgMgr as CfgMgr
-    HLTRoITopoRecoSequenceVDV = CfgMgr.AthViews__ViewDataVerifier("HLTRoITopoRecoSequenceVDV%s"%algSuffix)
-    HLTRoITopoRecoSequenceVDV.DataObjects = {( 'TrigRoiDescriptorCollection' , 'StoreGateSvc+PrecisionCaloRoIs%s'%algSuffix ),
-                                             ( 'CaloBCIDAverage' , 'StoreGateSvc+CaloBCIDAverage' ),
-                                             ( 'SG::AuxElement' , 'StoreGateSvc+EventInfo.averageInteractionsPerCrossing' )}
-
-    cellMaker = HLTCellMaker(flags, RoIs, algSuffix="RoI%s"%algSuffix)
-    topoClusterMaker = _algoHLTTopoCluster(flags, inputEDM = cellMaker.CellsName, algSuffix="RoI%s"%algSuffix)
-    RecoSequence = parOR("RoITopoClusterRecoSequence%s"%algSuffix, [HLTRoITopoRecoSequenceVDV, cellMaker, topoClusterMaker])
-    return (RecoSequence, topoClusterMaker.CaloClusters)
-
-
-def HLTHIRoITopoRecoSequence(flags, RoIs, algSuffix=''):
-
-    from TriggerMenuMT.HLT.Egamma.TrigEgammaKeys import  getTrigEgammaKeys
-    TrigEgammaKeys = getTrigEgammaKeys()
-    eventShape = TrigEgammaKeys.egEventShape
-
-    import AthenaCommon.CfgMgr as CfgMgr
-    HLTRoITopoRecoSequenceVDV = CfgMgr.AthViews__ViewDataVerifier("HLTHIRoITopoRecoSequenceVDV")
-    HLTRoITopoRecoSequenceVDV.DataObjects = {( 'TrigRoiDescriptorCollection' , 'StoreGateSvc+PrecisionCaloRoIs' ),
-                                             ( 'xAOD::HIEventShapeContainer' , 'StoreGateSvc+' + eventShape ),
-                                             ( 'CaloBCIDAverage' , 'StoreGateSvc+CaloBCIDAverage' ),
-                                             ( 'SG::AuxElement' , 'StoreGateSvc+EventInfo.averageInteractionsPerCrossing' )}
-
-    cellMaker = HLTCellMaker(flags, RoIs, algSuffix="HIRoI")
-    cellCorrector = _algoHLTCaloCellCorrector(
-        name='HLTRoICaloCellCorrector',
-        inputEDM=cellMaker.CellsName,
-        outputEDM='CorrectedRoICaloCells',
-        eventShape=eventShape)
-
-    topoClusterMaker = _algoHLTTopoCluster(flags, inputEDM = cellCorrector.OutputCellKey, algSuffix="HIRoI")
-    RecoSequence = parOR("HIRoITopoClusterRecoSequence", [HLTRoITopoRecoSequenceVDV, cellMaker, cellCorrector, topoClusterMaker])
-    return (RecoSequence, topoClusterMaker.CaloClusters)
-
-
-def HLTLCTopoRecoSequence(flags, RoIs='InViewRoIs'):
-    cellMaker = HLTCellMaker(flags, RoIs, outputName="CaloCellsLC", algSuffix="LC")
-    cellMaker.TileCellsInROI = True
-    topoClusterMaker = _algoHLTTopoClusterLC(flags, inputEDM = cellMaker.CellsName, algSuffix="LC")
-    RecoSequence = parOR("TopoClusterRecoSequenceLC",[cellMaker,topoClusterMaker])
-    return (RecoSequence, topoClusterMaker.CaloClusters)
-