Direct AJAX add to Cart on Simple Products without Extras 3
The below article is for WooFood , Food Ordering Plugin for WordPress and WooCommerce. If you don't already have it . Please take a look on the product page

You can use the following snippet to your functions.php on your child theme to disable the popup on simple products without extra options

add_filter('woofood_skip_popup_simple_without_extra', 'woofood_hook_skip_popup_when_simple_product');

function woofood_hook_skip_popup_when_simple_product()
	return true;

The above article is for WooFood Food Delivery Plugin for WooCommerce