Remove unused links in WordPress header

functions.php

/**
* Remove junk from head
*/
// remove WordPress version number
function crave_remove_version() {
	return '';
}
add_filter('the_generator', 'crave_remove_version');
remove_action('wp_head', 'wp_generator');

remove_action('wp_head', 'rsd_link'); // remove really simple discovery (RSD) link
remove_action('wp_head', 'wlwmanifest_link'); // remove wlwmanifest.xml (needed to support windows live writer)

remove_action('wp_head', 'feed_links', 2); // remove rss feed links (if you don't use rss)
remove_action('wp_head', 'feed_links_extra', 3); // removes all extra rss feed links

remove_action('wp_head', 'index_rel_link'); // remove link to index page

remove_action('wp_head', 'start_post_rel_link', 10, 0); // remove random post link
remove_action('wp_head', 'parent_post_rel_link', 10, 0); // remove parent post link
remove_action('wp_head', 'adjacent_posts_rel_link', 10, 0); // remove the next and previous post links
remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0 );

remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0 ); // remove shortlink

/**
* Disable the emoji's
*/
function glowlogix_disable_emojis() {
	remove_action( 'wp_head', 'print_emoji_detection_script', 7 );
	remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
	remove_action( 'wp_print_styles', 'print_emoji_styles' );
	remove_action( 'admin_print_styles', 'print_emoji_styles' ); 
	remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
	remove_filter( 'comment_text_rss', 'wp_staticize_emoji' ); 
	remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
	add_filter( 'tiny_mce_plugins', 'crave_disable_emojis_tinymce' );
	add_filter( 'wp_resource_hints', 'crave_disable_emojis_remove_dns_prefetch', 10, 2 );
}
add_action( 'init', 'glowlogix_disable_emojis' );

/**
* Filter function used to remove the tinymce emoji plugin.
* 
* @param array $plugins 
* @return array Difference betwen the two arrays
*/
function crave_disable_emojis_tinymce( $plugins ) {
	if ( is_array( $plugins ) ) {
		return array_diff( $plugins, array( 'wpemoji' ) );
	} else {
		return array();
	}
}

/**
* Remove emoji CDN hostname from DNS prefetching hints.
*
* @param array $urls URLs to print for resource hints.
* @param string $relation_type The relation type the URLs are printed for.
* @return array Difference betwen the two arrays.
*/
function crave_disable_emojis_remove_dns_prefetch( $urls, $relation_type ) {
	if ( 'dns-prefetch' == $relation_type ) {
		/** This filter is documented in wp-includes/formatting.php */
		$emoji_svg_url = apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/2/svg/' );
		$urls = array_diff( $urls, array( $emoji_svg_url ) );
	}
	return $urls;
}

/**
 * Disable embeds
 */
function crave_disable_embeds() {
	
	// Remove the REST API endpoint.
	remove_action( 'rest_api_init', 'wp_oembed_register_route' );
	
	// Turn off oEmbed auto discovery.
	add_filter( 'embed_oembed_discover', '__return_false' );
	
	// Don't filter oEmbed results.
	remove_filter( 'oembed_dataparse', 'wp_filter_oembed_result', 10 );
	
	// Remove oEmbed discovery links.
	remove_action( 'wp_head', 'wp_oembed_add_discovery_links' );
	
	// Remove oEmbed-specific JavaScript from the front-end and back-end.
	remove_action( 'wp_head', 'wp_oembed_add_host_js' );
	add_filter( 'tiny_mce_plugins', 'crave_disable_embeds_tiny_mce_plugin' );
	
	// Remove all embeds rewrite rules.
	add_filter( 'rewrite_rules_array', 'crave_disable_embeds_rewrites' );
	
	// Remove filter of the oEmbed result before any HTTP requests are made.
	remove_filter( 'pre_oembed_result', 'wp_filter_pre_oembed_result', 10 );
}
add_action( 'init', 'crave_disable_embeds', 9999 );
	
function crave_disable_embeds_tiny_mce_plugin($plugins) {
	return array_diff($plugins, array('wpembed'));
}
	
function crave_disable_embeds_rewrites($rules) {
	foreach($rules as $rule => $rewrite) {
		if(false !== strpos($rewrite, 'embed=true')) {
			unset($rules[$rule]);
		}
	}
	return $rules;
}