Revert "Turn on IPv6 for WebRTC as default as required before ramping the experiment to 30%."

This reverts commit 86c33e3a94f51f8e4b4f305708ec327786ad3794.

TBR=guoweis@webrtc.org

BUG=

Review URL: https://webrtc-codereview.appspot.com/47409004

Cr-Commit-Position: refs/heads/master@{#8608}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8608 4adac7df-926f-26a2-2b94-8c16560cd09d
5 files changed