[x] Photon_mvaID_Fall17V1p1 is needed ? Photon_mvaID is already there and correspond to the Fall17V2
[ ] Electron_dr03TkSumPt is used in the reco chain in PF Egamma Filter (electron ID), but
Swagata is not sure why it is needed in nano, or if any analysis team is using it or not.
some variable stored might be obsolete http://dalfonso.web.cern.ch/dalfonso/XPOG/NANV8/Summer20UL18NanoAODv2_TTToSemiLeptonic_size_report.html#Electron
ALL ph/ele are used https://github.com/cms-sw/cmssw/blob/master/PhysicsTools/NanoAOD/python/photons_cff.py#L170-L172 https://github.com/cms-sw/cmssw/blob/master/PhysicsTools/NanoAOD/python/electrons_cff.py#L310-L312
Some variable might not be needed (see nanov9) https://cms-nanoaod-integration.web.cern.ch/integration/cms-swmaster/mc106Xul17v2_size_report.html#Photon
Swagata is not sure why it is needed in nano, or if any analysis team is using it or not.
improve self documentation