fix regression on required checkbox fields

js/crm.payment.js

@@ -374,6 +374,9 @@
         var name = $(this).attr('name');
         $(this).attr('data-name', name);
         $(this).attr('name', name.replace('[' + name.split('[').pop(), ''));
+        $(this).removeAttr('required');
+        $(this).removeClass('required');
+        $(this).removeAttr('aria-required');
       });
 
       // Default email validator accepts test@example but on test@example.org is valid (https://jqueryvalidation.org/jQuery.validator.methods/)