Fix build failure
Fix build failure

There was a build failure due to including checks.h. Removed the include.
TBR=kwiberg@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/48639004

Cr-Original-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#8825}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: aa0bbab8ec359f50dc7d6a468d3a8bac01b39fc8

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