Wifi: not configured
Rather than removing a Wi-Fi network, it appears you've removed the Wi-Fi service. In OS X prior to 10.10, this means the AirPort shows Not Configured.

To allow configuration of AirPort, you need to add the Wi-Fi service back to the list of services:


Go to System Preferences → Network and click the + button to add a service.
Select Wi-Fi as the Interface and provide a service name.




This will allow configuration through the menu bar item.