Remove deprecated service manager linux sandbox.

Now there is but one sandbox implementation for all.  This
should finish the work required for the associated bug.

Bug: 708738
Change-Id: Ibec11aa3b47cf633590097a227b3b74372eb60b1
Reviewed-on: https://chromium-review.googlesource.com/740572
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Robert Sesek <rsesek@chromium.org>
Reviewed-by: Elliot Glaysher <erg@chromium.org>
Reviewed-by: Ken Rockot <rockot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#514227}
9 files changed