Remove PrLongLivedTracking and PrDebugUTTruthTool, only used for Upgrade
Upgrade is not supported on 2018-patches
branch.
To be backported also to lhcb-stripping24r2-28r2-patches
2017-patches
Cherry-picked from !1849 (merged)
Upgrade is not supported on 2018-patches
branch.
To be backported also to lhcb-stripping24r2-28r2-patches
2017-patches
Cherry-picked from !1849 (merged)