No popup that I've ever owned has had brakes to begin with! My FIL has a 7,000lb utility trailer with hydraulic surge brakes and they suck. I'd get rid of them. If the safety police give you a hard time, I'd install electric brakes. I wish my FIL would strip off the surge brakes and install electrics on his utility trailer. The hitch ball mechanism is fracked up and is almost impossible to hook up without smashing a finger and I've had to use a farm jack one time to get it to pop off the ball. Lubed the daylights out of it and it's still stubborn. I hate surge brakes.
2006 23B Hybrid with 10k round bar WDH
2011 F150 4x4 SCREW Ecoboost, Max Tow, Integrated TBC, 3.73 LS axle, Firestone Ride Rite airbags.