[Plugin: WordPress SEO by Yoast] How to remove rel=canonical from tag pages

Hi friends:

I want to noindex my tag pages but I’ve noticed that, although I’ve marked them as noindex, WordPress SEO plugin still adds rel=canonical tag.

Google says rel=canonical and noindex directives must not be together. So, I tried to remove canonical tag adding the following code to my functions.php file:

if ( is_tag() ) {
   add_filter( 'wpseo_canonical', '__return_false' );
   remove_action('wp_head', 'rel_canonical');
}

But nothing happened. The canonical tag is still there.

Do you know hao I can remove it?

Thanks in advance.

https://wordpress.org/plugins/wordpress-seo/