This reverts commit ebf71114a326080d523b3bc0c2160b2d848d8910. Reason for revert: Breaks downstream project. Original change's description: > 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} BUG=webrtc:10234 Change-Id: I856991260ff40a24f03f6054a5c2a9e6f37f47da Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/311803 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Owners-Override: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/main@{#40438}