How to Hide Premmerce Product Search for WooCommerce Admin Menus

function plt_hide_premmerce_search_menus() {
	//Hide "Premmerce".
	remove_menu_page('premmerce');
	//Hide "Premmerce → Search settings".
	remove_submenu_page('premmerce', 'premmerce-search-admin');
	//Hide "Premmerce → Affiliation".
	remove_submenu_page('premmerce', 'premmerce-search-admin-affiliation');
	//Hide "Premmerce → Upgrade".
	remove_submenu_page('premmerce', 'premmerce-search-admin-pricing');
}

add_action('admin_menu', 'plt_hide_premmerce_search_menus', 1000000000);

Where do I put this code?