[cflsystems]

You can't without some custom coding. Not that hard to hide it when only one option/variant is present but when you have 2+ it becomes very difficult due to the way XC works with and outputs them. XC does the "out of stock" on demand - you have to select options combination that are out of stock in order for XC to calc this and display it. When there is only one option/variant for a product you can use the "avail" attribute to hide any where "avail<1"