I'm looking for a simple mod that would allow me to do that at any time.
I believe you know that situation where there that one/two-tile island (additionally located on snow/tundra) that has Uranium or other resource and you know that city will not serve any other meaningful purpose than just contesting resources as further growth is just a wasted effort.
Just let the AI manage it itself, so it will not turn completelly useless by setting it to wealth production in city without any production or population. Is there a mod for that?