refactor(GatewayAutocomplete): remove commented code to streamline FilterManager component

frontend/src/FilterManager.jsx

@@ -518,8 +518,6 @@ function GatewayAutocomplete({ label, value, onChange, gateways = [], required =
           )}
         </div>
       </div>
-      
-      {/* Показываем выбранный gateway отдельной карточкой под полем */}
       {value && selectedGateway && !isOpen && (
         <div className="mt-2">
           <div className="d-flex align-items-center gap-2 p-2 bg-light rounded">