Removed unused Track V2 data members
DEPENDS ON: LHCb!1642 (merged)
Ancestors, extraInfo and fitResult was removed from Track V2 because they are unused. The reason Rec still changed is because these values were written at 2-3 places but never read, and extraInfo was replaced by 2 doubles where it's actually used.
Addresses LHCb#16 (closed)
Edited by Marco Cattaneo