drop --brick usage

We dropped the code from chromite, so scrub it here too.

BUG=chromium:530677
TEST=precq passes

Change-Id: I4b1f849c6e1060fb3b33e6021b6a1b39b11daada
Reviewed-on: https://chromium-review.googlesource.com/1144120
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Alex Klein <saklein@chromium.org>
2 files changed