how to delete/remove wordpress feed urls in header

How to delete/remove wordpress feed urls from the head tag in header.php?

Example these URLs:

<link rel="alternate" type="application/rss+xml" title="Example Business &raquo; Feed" href="http://example.com/feed/"/>
<link rel="alternate" type="application/rss+xml" title="Example Business &raquo; Comments Feed" href="http://example.com/comments/feed/"/>
<link rel="alternate" type="application/rss+xml" title="Example Business &raquo; Home Page Live Comments Feed" href="http://example.com/home/feed/"/>

I don't want to use any plugin for the same.

I’ve recently had a need to remove the feed url link elements and in trying to avoid customising the core WordPress functions the following solutions works.

Ensure you have a functions.php file in your theme directory that you are using. If not create the file and edit the file. The following lines will help remove select lines from your wp_head() function:

<?php
remove_action( 'wp_head', 'feed_links_extra', 3 ); // Display the links to the extra feeds such as category feeds
remove_action( 'wp_head', 'feed_links', 2 ); // Display the links to the general feeds: Post and Comment Feed
remove_action( 'wp_head', 'rsd_link' ); // Display the link to the Really Simple Discovery service endpoint, EditURI link
remove_action( 'wp_head', 'wlwmanifest_link' ); // Display the link to the Windows Live Writer manifest file.
remove_action( 'wp_head', 'index_rel_link' ); // index link
remove_action( 'wp_head', 'parent_post_rel_link', 10, 0 ); // prev link
remove_action( 'wp_head', 'start_post_rel_link', 10, 0 ); // start link
remove_action( 'wp_head', 'adjacent_posts_rel_link', 10, 0 ); // Display relational links for the posts adjacent to the current post.
remove_action( 'wp_head', 'wp_generator' ); // Display the XHTML generator that is generated on the wp_head hook, WP version
?>