Completely Disable Comments
It is very easy to completely disable comments and remove all comments-related features from the admin panel as well as the front end of your website.
The free WPCode plugin comes with a library of pre-configured code snippets, and you can use the ‘Completely Disable Comments’ snippet to remove all traces of them from your site.
Simply install and activate WPCode, and then navigate to Code Snippets » Library in your WordPress admin panel. Here, you can search for ‘completely disable comments’ and hover your mouse over the result named the same thing.
You can then click on ‘Use Snippet.’