How to Hide the "Showroom" Admin Menu

function plt_hide_my_woocommerce_product_virtual_showroom_menus() {
	//Hide the "Showroom" menu.
	remove_menu_page('MyWooCommerceShowroom_settings');
}

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

Where do I put this code?