SmartLock: Remove unused method StartAutoPairing.

R=khorimoto@chromium.org

Bug: none
Test: none
Change-Id: I2504fc6ad07fee7072ed135248bf793fc470a980
Reviewed-on: https://chromium-review.googlesource.com/1003521
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Dave Schuyler <dschuyler@chromium.org>
Commit-Queue: James Hawkins <jhawkins@chromium.org>
Cr-Commit-Position: refs/heads/master@{#549375}
6 files changed