Remove “Comment” column in all post-types

I got an alternative :

This will not just hiding but disabling also

function disable_comments() {
    $post_types = get_post_types();
    foreach ($post_types as $post_type) {
        if(post_type_supports($post_type,'comments')) {
            remove_post_type_support($post_type,'comments');
            remove_post_type_support($post_type,'trackbacks');
        }
    }
}
add_action('admin_init','disable_comments');