This plugin cannot be uninstalled - clicking the "remove" button in the UI does nothing to remove it - it says "pending"  but after a restart the plugin is still there and active.

The plugin can be deactivated, but this does not prevent the notifications of an "update" from being shown.

If physically removing the files, they are downloaded on the next Jenkins restart. How do I get rid of a plugin I do not need (and which I never installed)?