cleanup-header.php

<?php
/*
 * Source: https://gist.github.com/HechtMediaArts/aceadf06b5e4431dc33d
 */
//emoji aus dem header entfernen
function disable_emoji_dequeue_script() {
    wp_dequeue_script( 'emoji' );
}
add_action( 'wp_print_scripts', 'disable_emoji_dequeue_script', 100 );
remove_action( 'wp_head', 'print_emoji_detection_script', 7 ); 
remove_action( 'wp_print_styles', 'print_emoji_styles' );
// Header Links entfernen
add_action('init', 'remheadlink');
function remheadlink()
	{
	remove_action('wp_head', 'rsd_link');
	remove_action('wp_head', 'wp_generator');
	remove_action('wp_head', 'index_rel_link');
	remove_action('wp_head', 'wlwmanifest_link');
	remove_action('wp_head', 'feed_links', 2);
	remove_action('wp_head', 'feed_links_extra', 3);
	remove_action('wp_head', 'parent_post_rel_link', 10, 0);
	remove_action('wp_head', 'start_post_rel_link', 10, 0);
	remove_action('wp_head', 'wp_shortlink_wp_head', 10, 0);
	remove_action('wp_head', 'wp_shortlink_header', 10, 0);
	remove_action('wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0);
	}