Cleanup scripts and suppressions for TSan v1

Since we don't use it anymore on Linux and don't plan
to ever support it for Windows.

BUG=
R=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/31649004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7420 4adac7df-926f-26a2-2b94-8c16560cd09d