When cleaning out unused files in the repo, I found that we had two tutorial modules with several associated graphics files that were not being published (that is, they are not included in any assembly or listed in the Topic Map file).

I wasn't sure if these might be topics that we wanted to restore to the documentation, if only to create sections where we talk about Prometheus and Grafana.  I know that there are items in the backlog related to Prometheus, so it might be useful to create a section of the docs for Prometheus content.  I'm less sure about the need for the Grafana topic or how much future documentation there might be for Grafana?

The unused files are the following:

• modules/ossm-tutorial-grafana-acessing.adoc
  • images/ossm-grafana-home-screen.png
  • images/ossm-grafana-mesh-no-traffic.png
  • images/ossm-grafana-mesh-with-graffic.png
  • images/ossm-grafana-services.png
  • images/ossm-grafana-workloads.png
• modules/ossm-tutorial-prometheus-querying-metrics.adoc
  • images/ossm-prometheus-home-screen.png
  • images/ossm-prometheus-metrics.png