Access SG::ReadCondHandle<LArXTalkWeightGlobal> once per bunch-crossing rather...
Access SG::ReadCondHandle<LArXTalkWeightGlobal>
once per bunch-crossing rather than once per background event during pile-up digitization jobs.
Also drop obsolete ILArPileUpTool
interface.
(Follow-up on comments in !50157 (merged).) FYI @tadej, @damazio, @tlari.