removing website field from comment box

Hello,

I want to stop all automatic spam comments on my site. So wanted to remove the website field and disallow submitting comments if a user enters any link in the comment box.

Is the following functions.php code compatible with the Newspaper Tech news demo theme?

To Remove Comment Author Link:


function tagdiv_remove_comment_author_link( $return, $author, $comment_ID ) {
return $author;
}
add_filter( 'get_comment_author_link', 'tagdiv_remove_comment_author_link', 10, 3 );

function tagdiv_remove_comment_author_url() {
return false;
}
add_filter( 'get_comment_author_url', 'tagdiv_remove_comment_author_url');


To protect entering the website/link in the comments summary box

function remove_website_field($fields) {
unset($fields['url']);
return $fields;
}
add_filter('comment_form_default_fields', 'remove_website_field');


If the above code is not compatible, please share the correct one.

Regards,

It worked on desktop site but i am using mobile plugin and it is not removing website field on mobile site.

Do i need to add the code each time plugin updates or theme updates?