removed lumi producer from HI reco

The lumi producer appears to have been removed from the pp reconstruction since 42X, but this change was never propagated to HI reco.
Now it appears to be causing a crash, at least at one site, and we were advised on the luminosity hypernews to remove it:
https://hypernews.cern.ch/HyperNews/CMS/get/luminosity/440/1.html