remove airmo, rss

[lonnen]

the airmo screens group is empty and the playlist item hasn't worked since the cutover to onlineexperiences. There is a redirect but it loads an empty document. This change removes the playlist, the plugin from the environment, and the package as a dependency

[mythmon]

This will need a rebase for package-lock.json

[lonnen]

@mythmon regenerated it fresh during the rebase, should be good