the limit is ignored anyway. Also rename rtp datachannel bandwidth limit constant. BUG=webrtc:6625 Change-Id: If7b26691ced8148955e98c86b9bed692b2e55e8e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/189972 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Tommi <tommi@webrtc.org> Commit-Queue: Tommi <tommi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#32479}