RichTrackRadiatorMaterial - Remove unstable histogram properties
RichTrackRadiatorMaterial - Some of the histograms produced for this monitor are very close to delta-functions. This means some of the default stats. printed for them, R.M.S. etc. can be inherently unstable due to machine precision issues. This MR removes these from the table printed for this monitor.
Should hopefully address some tiny diffs seen in the LCG 97a tests
This might require ref. updates (not 100% sure of this).