Remove unused and not completely correct code

This stuff wasn't tested (EDIT: with the same tests as the rest of the system) and has diverged from reality, so it's time for it to go away.
It's short for expected & actual. Prevents you from having to retype long expressions or repeat a computation in both the condition and the Errorf. It makes more sense if you don't forget that last step like I did here. I'll fix.