Removing the resetting/re-init of encoder from QMVideoSettingsCallback.

This is not neeeded anymore as a change of frame size (down-sampling via QM callback) will trigger a new key frame in encoder.
Review URL: https://webrtc-codereview.appspot.com/456007

git-svn-id: http://webrtc.googlecode.com/svn/trunk@1950 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed