RSS Feed
RSS feed is a way for website authors to publish notifications of new content on their website. Really Simple Syndication is full name of RSS.
How to Remove Comment Feed
add_filter( 'feed_links_show_comments_feed', '__return_false' );
or
remove_action('wp_head', 'feed_links', 2);
There is two different code, You can paste any one code in your theme’s functions.php. Then removed Comment Feed from Head.