This removes a couple of methods from the PeerConnectionSdpMethods interface. Bug: webrtc:11995 Change-Id: I0a68178b1f0a99e779e6d7f94d03b493d811f500 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/249794 Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Commit-Queue: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#35841}