I would leave it.There's virtually nothing to be gained by removing/disabling it.It doesn't weigh enough to matter,and certainly doesn't draw any appreciable power away from the motor.Your gains will be bigger shoulder muscles and an appreciation for cars that have power steering
I actually have no Power steering now due to a leak & I definitely recommend keeping it. No p/s is such a hassle & if you're low & trying to avoid something at low speeds, its such a headache