Apple Pay - Payment Processing Certificate

Hey there, I have a question about the Payment Processing Certificate.
Does this certificate need to be in an account that is only using Push Provisioning in the apps? We don't have any payments being made in app.
Do the Wallet app use this certificate to make the payments? Or only stores uses it to make in-app payments?

The final question is: can we remove this certificate?

Apple Pay - Payment Processing Certificate
 
 
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