This class is no longer used.
Bug: webrtc:12102
Change-Id: I04f2b15856a6e8ebc75cbe7e5114e942d08bb65c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/191489
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32551}