Remove nag notices from Swell Lite theme

functions.php

<?php

// Queue up the child theme CSS
add_action( 'wp_enqueue_scripts', 'cleanretina_child_enqueue_styles' );

function cleanretina_child_enqueue_styles() {

    $parent_style = 'parent-style';

    wp_enqueue_style( $parent_style, get_template_directory_uri() . '/style.css' );
    wp_enqueue_style( 'child-style',
        get_stylesheet_directory_uri() . '/style.css',
        array( $parent_style ),
        wp_get_theme()->get('Version')
    );
}

add_action( 'admin_enqueue_scripts', 'mh_remove_credits' );

function mh_remove_credits() {
        // Remove nag notices.
        remove_action( 'admin_notices', 'swell_lite_admin_notice' );
        remove_action( 'admin_notices', 'swell_lite_admin_footer_notice' );
}