Remove unused auth_server.py

I wrote this long ago to mock out Gaia on test images.
We now do this in a totally different way, and nothing uses it.

BUG=None
TEST=None

Change-Id: I8d7434f3e10b34aba4e677e1aa2436a5e2773bd7
Reviewed-on: https://chromium-review.googlesource.com/237740
Trybot-Ready: Chris Masone <cmasone@chromium.org>
Tested-by: Chris Masone <cmasone@chromium.org>
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Commit-Queue: Chris Masone <cmasone@chromium.org>
3 files changed