I know a couple of places which are called control and definitely are radar equipped. My theory is that if the en-route unit bears the same name as an airport approach control, the approach control can be called radar and the en-route control becomes control.
For example in Tallinn:
- Approach / departure control is called “Tallinn Radar”
- En-route control is called “Tallinn Control”
I think the approach control its called Tallinn “radar” and not “approach” because it directs the departures and arrivals for more than one airport (also the nearby military base).
Not sure if this is correct, its just a theory.
Edit: now I’m thinking about it, in Sweden everything is called “Sweden control”, I doubt there is an airport called Sweden 
. Maybe you are right and they’ve never updated the name after receiving radar equipment.