Remove generic payment method icons (Stripe CC + Cheque) (#2968)

* remove generic icons from Cheque & Stripe CC payment methods

* remove icon prop from PaymentMethodLabel - no longer supported:
- icons should only be used for recognisable brands
- generic icons (e.g. credit card) are not recommended

* Revert "remove icon prop from PaymentMethodLabel - no longer supported:"

This reverts commit 1990028.

assets/js/payment-method-extensions/payment-methods/cheque/index.js

@@ -33,7 +33,7 @@ const Content = () => {
  */
 const Label = ( props ) => {
 	const { PaymentMethodLabel } = props.components;
-	return <PaymentMethodLabel icon="checkPayment" text={ label } />;
+	return <PaymentMethodLabel text={ label } />;
 };
 
 /**

assets/js/payment-method-extensions/payment-methods/stripe/credit-card/index.js

@@ -38,7 +38,6 @@ const StripeLabel = ( props ) => {
 
 	return (
 		<PaymentMethodLabel
-			icon="card"
 			text={ __( 'Credit / Debit Card', 'woo-gutenberg-products-block' ) }
 		/>
 	);