The Eco-Flow has been designed to work with the pump, without needing to have bits removed from it. To maintain your pump's warranty you would need to leave the pressure switch wired in, removing the pressure switch could affect your pumps warranty.
In general use the pressure switch will not activate at all as the Eco-Flow takes over this role as well as the role of regulating the flow rate. If it does activate, because of a fault, the Eco-Flow will then perform an emergency shut-down and inform you there is a problem.
The Eco-Flow also has protection circuitry that will protect itself from faulty pumps. Some other types of controllers can be damaged if a pump malfunctions whereas these models are protected.