Cómo ocultar campo de cantidad en producto variable de WooCommerce

Os explico 2 maneras de ocultar el campo de cantidad en los productos variables de WooCommerce.

function quantity_wp_head() {

	global $post;
	global $product;

	$product = wc_get_product( $post->ID );

	// $product->is_type( $type ) checks the product type, string/array $type ( 'simple', 'grouped', 'variable', 'external' ), returns boolean

	if ( $product->is_type( 'variable' ) ) {
	    ?>
		<style type="text/css">.quantity, .buttons_added { width:0; height:0; display: none; visibility: hidden; }</style>

		<?php 

	}

}
// add_action( 'wp_head', 'quantity_wp_head' );

/**
 * @desc Remove in all product type
 */
function wc_remove_all_quantity_fields( $return, $product ) {
	if ($product->is_type('variation')) {
		return true;
	}

	return $return;
}
 add_filter( 'woocommerce_is_sold_individually', 'wc_remove_all_quantity_fields', 10, 2 );