Since the wheel only has to slightly clear the frame, just unbolting the brake torque arm and the two wheel nuts is all you need to do to slide the wheel out enough. You may have to undo ties securing the brake and gearchange cable outers to the frame if they impede the removal. Putting the wheel back means adjusting it for the chain to have about half inch of vertical slack in the centre of the chain run and making sure the front of the wheel is centred between the frame tubes before finally clamping the wheel nuts and the brake torque arm. If you are careful the gearchange adjustment won't be changed.