Remove unnecessary build message.
Remove unnecessary build message.

R=henrika@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/13909004

Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: d212ffcfc6694e8ff933e579146e01a1b330e674

sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc,sippet/webrtc