Delete Unused Modules and "Compatibility" Type Aliases

[DavisDevelopment]

There's really a lot of dead code floating about in this project, and it's cluttering the whole application. I need to prune as much of that away as possible, to make it more pleasant/less confusing to navigate the source code. Probably even some performance benefits.
So, goals are:

• Delete source files...
  • for modules that aren't being used ever
  • for modules that have been since replaced, or moved to a different package-path

I should put together a list of paths to files to be removed sometime soon.