We still have docs up for the setup of v1 metrics which have been disabled due to a security issue. We're now only supporting our v2 metrics endpoint which uses jolokia. We should update our foss docs to reflect this change following the pattern found in the puppetserver metrics docs.
I'm not sure we want to remove the v1 metrics docs completely like the ticket says. Puppetserver still has docs up for their v1 endpoint. Our docs' navigation tree was missing the docs for v2 and that's definitely an issue. PR #3640 adds this missing navigation tree link.