wc-remove-variation-stock-display.php

<?php // only copy if needed

/**
 * Removes the stock / availability HTML from the product variation
 *   since this is added via js the stock HTML filter is ignored
 *
 * @param array $data the variation data
 * @return array updated data
 */
function sww_wc_remove_variation_stock_display( $data ) {
	unset( $data['availability_html'] );
	return $data;
}
add_filter( 'woocommerce_available_variation', 'sww_wc_remove_variation_stock_display', 99 );