References to PlayoutDelayOracle and the deprecated RtpSenderVideo
constructor have been removed in downstream code, we can now clean the
unused code away.
Bug: webrtc:10809, webrtc:11340
Change-Id: I789274be2079ad4ddd7e83a5fa249b06a32a4e82
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/168400
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30499}