Remove cyclic import from ignored for tests.

It may be worth adding a script to check that our `pylint` configs don't get out of sync.

I hastily hacked together:
https://gist.github.com/dhermes/8516afb92d14fdc38cb6
Touche.

What if I add a check to make sure our assumptions aren't broken.

Something like a whitelist of `(section, option)` values we accept?

I suppose at that point the pragmatic thing to do is just put the single `(section, option)` modification in `run_pylint.py` and forget about an extra file.

WDYT?