Correctly adjusted, the bias value will be fully closed when the car is unladen, so disconnecting will have this affect also. Perfectly acceptable as the front/rear bias is within the correct limits. It is safe to disconnect it from the beam, as it will run the brakes as if the car is unladen, and seeing as your car has no interior and no weight in the back, nick its fine. You are simply driving the car around as if you dont have any rear passengers, with the valve fully closed, like most of use do.
As for removing it im not so sure, it probably isnt a good idea due to flow rates being limted within the valve(in normal position)
