Proposing the deprecation of this in favor of the [hubot-grafana](https://www.npmjs.com/package/hubot-grafana) package, which offers cross-adapter support, dashboard browsing and can be augmented with Amazon S3 credentials.
Fixes#2206
removes auth hack to allow phantomjs to query pages as a user
without auth. Instead we pass phantomjs the session cookie,
which it then includes in the request.