Proximity Auth: Remove kMultiDeviceApi flagging from UnlockManagerImpl.

R=hansberry@chromium.org

Bug: 899324
Test: none
Change-Id: Idc3b7e4bb138d0c81066f6e32af97bd67979e8c4
Reviewed-on: https://chromium-review.googlesource.com/c/1325349
Commit-Queue: James Hawkins <jhawkins@chromium.org>
Reviewed-by: Ryan Hansberry <hansberry@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606510}
1 file changed