[ironic] Future of Metalsmith

For almost two years, the Ironic team has had a "maintenance mode" message on the Metalsmith readme: "Please note the Metalsmith project is in maintenance mode and it's functionality is slowly being introduced into Ironic's API and usual clients. No additional features are expected to be added to Metalsmith directly." CI is currently not passing on this repository, and as far as I can tell there are no engaged users of this project upstream, and no current maintainers of Ironic invested in keeping this project afloat. I propose we retire the metalsmith project and exclude it from the Flamingo release. Are there any objections? Thanks, JayF