removed proptypes from add-to-cart (https://github.com/woocommerce/woocommerce-blocks/pull/9615)

Co-authored-by: Niels Lange <info@nielslange.de>

plugins/woocommerce-blocks/assets/js/atomic/blocks/product-elements/add-to-cart/block.tsx

@@ -1,7 +1,6 @@
 /**
  * External dependencies
  */
-import PropTypes from 'prop-types';
 import classnames from 'classnames';
 import {
 	AddToCartFormContextProvider,
@@ -85,8 +84,4 @@ const Block = ( { className, showFormElements }: Props ) => {
 	);
 };
 
-Block.propTypes = {
-	className: PropTypes.string,
-};
-
 export default withProductDataContext( Block );