Remove stub-cros-settings switch

This removes some testing code from production that was active only
when this switch was set.

Bug: 909635
Change-Id: I55652a2edd1a1c16d0601d877a954ce60d89e6c0
Reviewed-on: https://chromium-review.googlesource.com/c/1402874
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Achuith Bhandarkar <achuith@chromium.org>
Commit-Queue: A Olsen <olsen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621667}
9 files changed