Hide quantity in checkout page for bookable products

function.php

//snippet to hide quantity in checkout page for bookable products
add_filter( 'woocommerce_checkout_cart_item_quantity', 'woocommerce_checkout_cart_item_quantity_ph',10,3 );
function woocommerce_checkout_cart_item_quantity_ph($quantity_html,$cart_item,$key ) {
	if(!empty($cart_item) && isset($cart_item['product_id']) && !empty($cart_item['product_id']))
	{
		$product=wc_get_product($cart_item['product_id']);
		if(!empty($product) && !empty($product->get_type()) && $product->get_type()=='phive_booking')
		{
			return "";
		}
	}
	return $quantity_html;
}