Disable URL fields in comments

Good afternoon,

I have Astra theme in my site. I am getting to many spam comments lately, so I have decided to remove the URL field in them, in order to discourage spam in my site.

I have tried including this simple code in my snippets code plugin, but it is not working:

function remove_url_field($fields){

unset($fields['url']);

return $fields;

}

add_filter('comment_form_default_fields', 'remove_url_field');

I have read this may be caused because the Astra theme does not use the default comments of WordPress.

I know there is the option of hiding it with CSS, but I don't want to use it as I think this solution is not "clean".

Please, could you help me to solve this?

Thanks in advance

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