not sure if there is a fuse for it, though tbh i really don't think there is but i could be wrong.
you could try disconnecting it but it will bring on the engine management light. so you would need vagcom to reset it.
if you drive the car with it disconnected i think you will experience power loss so i don't advise driving it far or hard.
if the noise is still there i would look at taking the power steering belt (aux belt) off and try that then all else fails timing belt side of things.
if you are happy to do this test it may
help, if you have a a long screwdriver or thin solid typre metal pole put one end against the pump and one against you ear and the noise will resonate along the pipe and you can locate it that way even for pulley noises though only put the pipe against the housing the pulley is on, you do get a special tool for this its a type of stethoscope.