It was previously used to get RTT for a receive stream, but it is no longer used.
Also some minor cleanup: fixed includes and removed comments about network thread.
Bug: none
Change-Id: Ia2612ea04be5df82cfe6528c0226095827ea3c77
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/374042
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#43704}
75dc9c9ed3