Removal of LAr HGTD methods from AtlasDetectorID
This is a follow-up from !35563 (merged) - since the LAr version of HGTD_ID
was removed there, it should also be safe to remove the remaining references to the old LAr HGTD implementation in AtlasDetectorID
.
Also brought up through discussion from https://its.cern.ch/jira/browse/ATLASSIM-4890