Cleanup ST and IT from tracking

To fix compilation errors following LHCb!2744 (closed) I propose to remove a number of algorithms, and patch a few more.

added cleanup label

This builds in lhcb-run3-cleanup

mentioned in issue Moore#206 (closed)

• [2020-09-03 00:15] Validation started with lhcb-run3-cleanup#4
• [2020-09-04 00:09] Automatic merge failed in lhcb-run3-cleanup#5

mentioned in merge request !2199 (closed)

Starting over as this is based on a calo commit and as it conflicts. !2199 (closed)

closed

note that you don't have to close the MR -- just 'force push' to the same branch....

I'm still learning :)