How to Hide WordPress EZ Backup Admin Menus

function plt_hide_wordpress_ez_backup_menus() {
	//Hide "EZ Backup".
	remove_menu_page('wordpress-ez-backup/wp-ezbackup.php');
	//Hide "EZ Backup → EZ Backup".
	remove_submenu_page('wordpress-ez-backup/wp-ezbackup.php', 'wordpress-ez-backup/wp-ezbackup.php');
	//Hide "EZ Backup → Run Backup".
	remove_submenu_page('wordpress-ez-backup/wp-ezbackup.php', 'ezbackup-run');
	//Hide "EZ Backup → Backup Browser".
	remove_submenu_page('wordpress-ez-backup/wp-ezbackup.php', 'ezbackup-browse');
	//Hide "EZ Backup → Restore".
	remove_submenu_page('wordpress-ez-backup/wp-ezbackup.php', 'ezbackup-restore');
	//Hide "EZ Backup → Activate Addons".
	remove_submenu_page('wordpress-ez-backup/wp-ezbackup.php', 'ezbackup-activate');
	//Hide "EZ Backup → EZ Backup Help".
	remove_submenu_page('wordpress-ez-backup/wp-ezbackup.php', 'ezbackup-help');
}

add_action('admin_menu', 'plt_hide_wordpress_ez_backup_menus', 11);

Where do I put this code?