Remove kMaxWaitForStatsMs from tsanv2 compilation.
Remove kMaxWaitForStatsMs from tsanv2 compilation.

As some tests are #ifdef'd out on THREAD_SANITIZER this constant
triggers an unused-const-variable warning which breaks the build.

BUG=1205,3220
TBR=tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/13579004

git-svn-id: 917f5d3ca488f358c4d40eaec14422cf392ccec9@6308 4adac7df-926f-26a2-2b94-8c16560cd09d

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