How to Hide the "Noindex Paged" Admin Menu

function plt_hide_noindex_paged_orgv_menus() {
	//Hide the "Settings → Noindex Paged" menu.
	remove_submenu_page('options-general.php', 'noindex-paged-orgv-settings');
}

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

Where do I put this code?