function plt_hide_wp_health_menus() {
//Hide the "Tools → Scheduled Actions" menu.
remove_submenu_page('tools.php', 'action-scheduler');
//Hide the "Settings → WP Umbrella" menu.
remove_submenu_page('options-general.php', 'wp-umbrella-settings');
}
add_action('admin_menu', 'plt_hide_wp_health_menus', 11);