Philipp Hancke ebf71114a3 Clean up WebRTC-FilterAbsSendTimeExtension field trial
which has been enabled by default for a while. Also document the
expected behavior, see
  https://groups.google.com/g/discuss-webrtc/c/vfrnxWBVcdA/m/ASf7dBJOGAAJ
for more details.

BUG=webrtc:10234

Change-Id: If793e2b4b6cebb07371bfdf1f94ed8d49bf2bb34
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/311281
Commit-Queue: Philipp Hancke <phancke@microsoft.com>
Reviewed-by: Konrad Hofbauer <hofbauer@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#40417}
2023-07-11 15:45:16 +00:00
..