While porting over to Django 1.11, we had a lot of code blocked off by

version checks. As this is no longer needed, this code has been removed,

slimming things down just a bit.
There are still places where we call compatibility functions, or do

things in a legacy way, and there's likely other walled-off code that

uses something other than version checks, but this gets us a good step

of the way toward eliminating all that.

Unit tests pass.