Fix impact parameter ntuple branches

Removed them for taus because it's a pain (if somebody complains I'll add them back in) and jets because they never meaningfully had them anyway. Added IP3D branch and renamed IP3DS to IP3DSig because it was confusingly similar to SIP3D = IP3D/IP3DS.

Also removed a few old branches (more removals to come) and made a small number of little more-or-less cosmetic fixes.
At some point in the future (not necessarily now), we need to create a header file to define such constants.