How to delink the credit card in the payment option

How to change your payment method on your iPhone, iPad or iPod touch

1. To add a payment method, tap Add Payment Method.
2. To update a payment method, tap the payment method, then edit your information. ... 
3. To remove a payment method, tap Edit, then tap the Delete button.

I have clearly mentioned it above, read the above point 3-it explains it.

When tapping edit there is no delete option