There is no "Input Options" in the left column. It just isn't true, and you know it. Anyone who isn't intentionally lying, able to answer OP's question?
edit: solved it: first reset your pin, even though you have no intention of using it. Then, the remove option becomes available. Microsoft really, really, REALLY wants you to use a pin instead of a password, so it's no surprise their representative here is trying to confuse everyone with pure <removed>