Remove history tracker for now

Although this will need to go back in at some point (it's on the road map), this was added as a feature that was never finished.

Fast forwarding to today, it is causing issues with embedding that can be dealt with later while I try to fix the `missing.png` calamity that is going on right now.

TL;DR: We need history tracking at some point, but it's just bloat right now and is causing some suspect bugs with embedded relations.