[Classic Themes] How do I remove the “Comments are closed” text on a post or page?

First, navigate to the Appearance menu in your WordPress dashboard, and click on Customize. From there, you’ll see a tab for Additional CSS. Click on that tab and you’ll be able to add in the CSS code you’d like to implement.

Simply copy and paste the code below, and click the Publish button when you’re finished.

#comments p.no-comments {
    display: none;
}