Removing Old Code in Simulation Package
I removed HitProfile and MCDigitInfo from the Simulation package. These two modules don't seem to be used by anyone in nova code. They seem to have been ported over from framework and then ignored. I wanted to either fix them or delete them - they contained code that referred to track ids as unsigned shorts. This causes problems in the case of multiple neutrino interactions, when the track id can be too large to save as a short. I also removed references to these modules in sim.h and classes_def.xml.