This removes the field trial WebRTC-Pacer-UsePrioritizedPacketQueue.
Bug: webrtc:11340
Change-Id: I9a7ee64ff5ae3ad1fee6ed5d552ec681e3b4b534
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/272240
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37852}