Reason for revert:
Breaking webrtc builder.
Original issue's description:
> Adding IceConfig option to assume TURN/TURN candidate pairs will work.
>
> This will allow media to be sent on these pairs before a binding
> response is received, shortening call setup time. However, this is only
> possible if the TURN servers don't require CreatePermission when
> communicating with each other.
>
> R=honghaiz@webrtc.org, pthatcher@webrtc.org
>
> Committed: https://crrev.com/8e6134eae4117a239de67c9a9dae8f5e3235d803
> Cr-Commit-Position: refs/heads/master@{#13263}
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
TBR=pthatcher@webrtc.org,deadbeef@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
Review-Url: https://codereview.webrtc.org/2090823002
Cr-Commit-Position: refs/heads/master@{#13264}
13d5db3857