Disable comments

[ccorda]

Let's move to their own file, and make sure we're hiding from posts/page lists as well:

function remove_posts_columns($columns) {
    unset($columns['comments']);
    return $columns;
}
add_filter('manage_posts_columns', 'remove_posts_columns', 10, 2);

function remove_pages_count_columns($defaults) {
    unset($defaults['comments']);
    return $defaults;
}
add_filter('manage_pages_columns', 'remove_pages_count_columns');

[ccorda]

Potential plugin:
https://github.com/WPDevelopers/disable-comments

SQL to remove existing comments:
https://www.hostinger.com/tutorials/how-to-delete-all-comments-wordpress#:~:text=The%20most%20straightforward%20way%20to,and%20choose%20Move%20to%20Trash.

Another potential option:
https://gist.github.com/mattclements/eab5ef656b2f946c4bfb