drop unittest blacklist file

This hasn't been used since we converted to Python.

BUG=chromium:486263
TEST=precq passes

Change-Id: I53be41a94d7d4a185a6b1110973db83a6feebb8d
Reviewed-on: https://chromium-review.googlesource.com/1163140
Commit-Ready: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Gregory Meinke <gmeinke@chromium.org>
2 files changed