How to Hide Next-Cart Store to WooCommerce Migration Admin Menus

function plt_hide_nextcart_woocommerce_migration_menus() {
	//Hide "Next-Cart Migration".
	remove_menu_page('nextcart-migration');
	//Hide "Next-Cart Migration → Next-Cart Migration".
	remove_submenu_page('nextcart-migration', 'nextcart-migration');
	//Hide "Next-Cart Migration → URL Redirects".
	remove_submenu_page('nextcart-migration', 'nextcart-seo-url');
	//Hide "Next-Cart Migration → How It Works".
	remove_submenu_page('nextcart-migration', 'nextcart-how-it-works');
	//Hide "Next-Cart Migration → Extra Services".
	remove_submenu_page('nextcart-migration', 'nextcart-extra-services');
	//Hide "Next-Cart Migration → Pro License".
	remove_submenu_page('nextcart-migration', 'nextcart-unlimited-migration');
	//Hide "Next-Cart Migration → Settings".
	remove_submenu_page('nextcart-migration', 'nextcart-settings');
}

add_action('admin_menu', 'plt_hide_nextcart_woocommerce_migration_menus', 11);
Where do I put this code?