disable wp-embed and wp-emoji

functions.php

<?php

// Disable wp-embed
function disable_embed_feature(){
    wp_deregister_script( 'wp-embed' );
}
add_action('wp_footer', 'disable_embed_feature');

// Disable wp-emoji
function disable_emoji_feature()
{
    // Prevent Emoji from loading on the front-end
    remove_action('wp_head', 'print_emoji_detection_script', 7);
    remove_action('wp_print_styles', 'print_emoji_styles');

    // Remove from admin area also
    remove_action('admin_print_scripts', 'print_emoji_detection_script');
    remove_action('admin_print_styles', 'print_emoji_styles');

    // Remove from RSS feeds also
    remove_filter('the_content_feed', 'wp_staticize_emoji');
    remove_filter('comment_text_rss', 'wp_staticize_emoji');

    // Remove from Embeds
    remove_filter('embed_head', 'print_emoji_detection_script');

    // Remove from emails
    remove_filter('wp_mail', 'wp_staticize_emoji_for_email');

    // Disable from TinyMCE editor. Currently disabled in block editor by default
    add_filter('tiny_mce_plugins', 'disable_emojis_tinymce');

    /** Finally, prevent character conversion too
     ** without this, emojis still work
    ** if it is available on the user's device
    */

    add_filter('option_use_smilies', '__return_false');
}

// Disables emojis in WYSIWYG editor
function disable_emojis_tinymce($plugins)
{
    if (is_array($plugins)) {
        $plugins = array_diff($plugins, array('wpemoji'));
    }
    return $plugins;
}
add_action('init', 'disable_emoji_feature');

?>