Deletes an extended field.
When an extended field is deleted, any contact data stored in the field is also permanently deleted.
This method may require higher-level permissions than the caller has, based on their identity and roles and permissions. In these cases, you can ensure the method is called with the required level of authorization by using one of the following:
Extended field key.
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.