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These classes represented Bluetooth Classic connections, which are no longer used.

R=khorimoto@chromium.org

Bug: none
Test: none
Change-Id: I8223f3afca936cf3711f4a73334e9d8aed80d9e1
Reviewed-on: https://chromium-review.googlesource.com/964624
Commit-Queue: James Hawkins <jhawkins@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543530}