remove specs related to Payment#credit! since that method is no longer supported
remove specs related to Payment#credit! since that method is no longer supported

solidusio/solidus_braintree,solidusio/solidus_braintree,solidusio/solidus_braintree,solidusio/solidus_braintree,alepore/spree_braintree,alepore/spree_braintree,alepore/spree_braintree