Click Credit/Debit Cards under Financial Information.
Select the credit card to remove and click Remove.
A few things to keep in mind:
You cannot remove a card if you have a pending transaction or if your card was the backup payment method for a recent instant bank payment. Wait a few days and try again.
You may not be able to remove your card if you have a negative balance in your PayPal account. In this situation, you must bring your balance to zero or higher to remove your card.
If you remove your only card and have a confirmed bank account, you’ll no longer be able to make instant bank payments. Instead they’ll be sent as eChecks, which take three to four working days to process.