Remove a suppression that does not fire anymore.

BUG=257543
R=yangguo@chromium.org
TBR=yangguo@chromium.org

Review URL: https://codereview.chromium.org/149083003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@248972 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 248972