You can remove the WooCommerce sku line – SKU: N/A Category from products in WordPress by using the ‘wc_product_sku_enabled‘ filter. Just add in your theme’s functions.php file…
add_filter( ‘wc_product_sku_enabled’, ‘__return_false’ );
This will remove the sku everywhere.
Remove the SKU Item Conditionally
You may want to keep the SKU info published on some categories or products only – you can use the same