Proximity Auth: Remove unused BluetoothLowEnergeyConnectionFinder.

R=khorimoto@chromium.org

Bug: 899324
Test: none
Change-Id: I00093b332711218ac96cca78fdfe17ab8ae7f1e7
Reviewed-on: https://chromium-review.googlesource.com/c/1330720
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: James Hawkins <jhawkins@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607062}
4 files changed