wp-remove-actions.php

<?php
/**
 * Plugin Name: WP Remove Actions
 * Plugin URI:  https://gist.github.com/19h47/4b8d03bb0cd5942390830c3bc49422fe
 * Description: Mostly involved with cleaning up default WordPress cruft..
 * Version:     0.0.0
 * Author:      Jérémy Levron
 * Author URI:  https://19h47.fr
 *
 * @package 19h47/wp-remove-actions
 */

add_action( 'wp_loaded', 'wp_remove_actions_cleanup', 1 );

add_filter( 'pre_get_shortlink', '__return_empty_string' );
add_filter( 'wpseo_canonical', '__return_false' );

add_action( 'init', 'wp_remove_actions_disable_emojis' );

/**
 * Disable emojicons.
 *
 * @see    http://wordpress.stackexchange.com/questions/185577/disable-emojicons-introduced-with-wp-4-2
 * @return void
 */
function wp_remove_actions_cleanup() {
	remove_action( 'admin_print_scripts', 'print_emoji_detection_script' );
	remove_action( 'admin_print_styles', 'print_emoji_styles' );
	remove_action( 'wp_print_styles', 'print_emoji_styles' );
	remove_action( 'wp_head', 'rsd_link' );
	remove_action( 'wp_head', 'wlwmanifest_link' );
	remove_action( 'wp_head', 'wp_shortlink_wp_head' );
	remove_action( 'wp_head', 'wp_generator' );
	remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head' );
	remove_action( 'wp_head', 'rest_output_link_wp_head' );
	remove_action( 'wp_head', 'wp_oembed_add_discovery_links' );
	remove_action( 'wp_head', 'rel_canonical' );
	remove_action( 'wp_head', 'feed_links', 2 );
	remove_action( 'wp_head', 'feed_links_extra', 3 );

	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' );
}


/**
 * Hide extranneous dashboard widgets
 *
 * @return void
 */
function wp_remove_actions_remove_dashboard_widgets() : void {
	global $wp_meta_boxes;

	unset( $wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press'] );
	unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links'] );
	unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now'] );
	unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins'] );
	unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_drafts'] );
	unset( $wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments'] );
	unset( $wp_meta_boxes['dashboard']['side']['core']['dashboard_primary'] );
	unset( $wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary'] );
	unset( $wp_meta_boxes['dashboard']['normal']['core']['yoast_db_widget'] );
}


/**
 * Disable the emoji's
 */
function wp_remove_actions_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', 'wp_remove_actions_disable_emojis_tinymce' );
	add_filter( 'wp_resource_hints', 'wp_remove_actions_disable_emojis_remove_dns_prefetch', 10, 2 );
}

/**
 * Filter function used to remove the tinymce emoji plugin.
 *
 * @param array $plugins Plugins.
 * @return array Difference betwen the two arrays
 */
function wp_remove_actions_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 wp_remove_actions_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;
}