[webrtc-svc] new commits pushed by aboba

The following commits were just pushed by aboba to https://github.com/w3c/webrtc-svc:

* Remove outdated ack and empty changelog

remains from a copy & paste
  by Dominique Hazael-Massieux
https://github.com/w3c/webrtc-svc/commit/07746730f022f8b80c1b73c7094dfbec95194b1e

* Merge pull request #31 from w3c/outdated-acks

Remove outdated ack and empty changelog
  by Bernard Aboba
https://github.com/w3c/webrtc-svc/commit/d07b4262dcd30ad0379f91c741494f3f926acd59