Disable WordPress Emoji's

remove-emojis.php

<?php
/**
 * No thanks on emojis.
 *
 * @return void
 */
function disable_wp_emojicons() {

	// all actions related to emojis.
	remove_action( 'admin_print_styles', 'print_emoji_styles' );
	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_filter( 'wp_mail', 'wp_staticize_emoji_for_email' );
	remove_filter( 'the_content_feed', 'wp_staticize_emoji' );
	remove_filter( 'comment_text_rss', 'wp_staticize_emoji' );

	// filter to remove TinyMCE emojis.
	add_filter( 'tiny_mce_plugins', 'disable_emojicons_tinymce' );
}
add_action( 'init', 'disable_wp_emojicons' );

/**
 * Disable in TinyMCE editor.
 *
 * @param array $plugins tinymce plugins.
 * @return array
 */
function disable_emojicons_tinymce( $plugins ) {
	if ( is_array( $plugins ) ) {
		return array_diff( $plugins, array( 'wpemoji' ) );
	} else {
		return array();
	}
}

/**
 * No thanks on embeds
 *
 * @return void
 */
function deregister_footer_scripts() {
	wp_dequeue_script( 'wp-embed' );
}
add_action( 'wp_footer', 'deregister_footer_scripts' );