[Wilds] Remove all linters and test cases not used by Arcanist

Summary: Ref T13098. I may restore some of these later, but this was a big obvious step in getting arc unit passing. I'd generally like these to live in third party libraries some day, if not immediately.

Test Plan: No failing tests after D19716.

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13098

Differential Revision: https://secure.phabricator.com/D19717