NetEq packet source input doesn't have any other uses than rtp dump, so remove that layer. Bug: None Change-Id: I667bb4aead9f0f2fe8a1c0d6d911a4670ded67e7 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/300542 Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org> Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org> Cr-Commit-Position: refs/heads/main@{#39810}