title: remove wordpress yoast seo plugin meta keywords from custom pages
body: <p>I have created a custom template page using WordPress Template redirect. 
  Now my problem is WP Yoast SEO Plugin is doing page analysis and placing meta tags with page not found values. </p>
  
  <p>I want to disable WP Yoast SEO page analysis on my custom page. I tried to follow the API for this plugin <a href="https://yoast.com/wordpress/plugins/seo/api/" rel="nofollow noreferrer">in this link</a> and used the following in my theme's <code>functions.php</code> but no luck </p>
  
  <pre><code>add_filter( 'wpseo_metakey', '__return_false' );
  </code></pre>