How to Hide the "Enhanced Ecommerce GTM" Admin Menu

function plt_hide_enhanced_ecommerce_datalayer_menus() {
	//Hide the "Settings → Enhanced Ecommerce GTM" menu.
	remove_submenu_page('options-general.php', 'enhanced-ecommerce-datalayer');
}

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

Where do I put this code?