This method used to be wired down to VCMReceiver and to VCMJitterBuffer::Stop, but has become a nop. Also delete some obsoleted comments. Bug: webrtc:7408 Change-Id: I4c1e67272b1ffda786cc0ff358fa38e594aff304 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/152620 Reviewed-by: Philip Eliasson <philipel@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29167}