Removed unused protobufs/constants for concierge

This removes dead code from breaking half of concierge into cicerone.
All code being removed is no longer referenced in Chrome or Chrome OS.

BUG=chromium:842845
TEST=Builds
CQ-DEPEND=CL:1104872

Change-Id: I008f87a81e809417d5137ce8ab1236b261674b95
Reviewed-on: https://chromium-review.googlesource.com/1104875
Commit-Ready: Jeffrey Kardatzke <jkardatzke@google.com>
Tested-by: Jeffrey Kardatzke <jkardatzke@google.com>
Reviewed-by: Dan Erat <derat@chromium.org>
3 files changed