This change removes sequence_number from RtpPacketInfo since it's currently not used. Bug: webrtc:10668 Change-Id: I9b45c7476457df1d18173f37c421374108678931 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/141873 Reviewed-by: Stefan Holmer <stefan@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Commit-Queue: Chen Xing <chxg@google.com> Cr-Commit-Position: refs/heads/master@{#28281}