Remove perf dashboards for security reasons.

A week-long log analysis shows that these aren't being accessed through chromegw or build.chromium.org (but may be accessed by internal masters directly).

Review URL: https://codereview.chromium.org/171303002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/perf@252384 0039d316-1c4b-4281-b951-d872f2087c98
15 files changed