Q: How do I get rid of a payment method on the Ipod5?

Every time I go to download an app it asks for my password then billing information. I don't have any credit cards or gift cards to put into the billing information so I would like to know how to get rid of the payment method I have and put it back to the original thing where it says add a payment.

Again, I would like to get rid of my current payment method so I don't have to put any in.

I have an Ipod touch generation 5 with no back camera. Please help me out. Thank You <3