Remove the restriction to allow having both webrtc and talk changes in the same cl.

This restriction is no longer needed as the auto sync script can handle changes to both folder in same commit correctly.

BUG=
R=andrew@webrtc.org, henrike@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/15479006

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6225 4adac7df-926f-26a2-2b94-8c16560cd09d