Smart Lock: Remove unused Chrome app manifest.

R=hansberry@chromium.org

Bug: 899324
Test: none
Change-Id: I08eff200cd6d8eb2eaad989d0abcab7fc1f3d53f
Reviewed-on: https://chromium-review.googlesource.com/c/1321030
Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Reviewed-by: Steven Bennetts <stevenjb@chromium.org>
Reviewed-by: Devlin <rdevlin.cronin@chromium.org>
Commit-Queue: James Hawkins <jhawkins@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606563}
6 files changed