Incorrectly updating FSR every time a file opens

The issue is these two lines here: https://gitlab.cern.ch/lhcb/LHCb/-/blob/master/PyConf/python/PyConf/application.py?ref_type=heads#L1268

Now DaVinci uses up a lot of memory every time it opens a file because it is dumping the entire FSR into the sink every time. Is there a reason for this? Can we remove these?

@dfazzini @graven @cburr @nskidmor @msaur