Old Credit Card Stored Info

When I go to pay for something online, say a pizza, I go to the credit card field and a drop down list of all of my cards, even old ones, show in a list. Several are outdated and I want to remove them but they're not in my Apple Pay...where are they stored from historical purchases? Where can I find them on my Mac so I can delete them from populating on that list? Again, they are not in my Apple Pay, I have that current.

Thanks,

Jim