Delete the files used by TSan v1 on Mac (which isn't supported anymore):
 - suppressions
 - ignores
 - gtest_exclude files

BUG=308605
TBR=timurrrr@chromium.org

Review URL: https://codereview.chromium.org/32593005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@229856 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 229856