(WooCommerce) Remove Sidebar only on Single-Product page

The conditional tag for single products is is_product()

add_action('template_redirect', 'remove_sidebar_shop');
function remove_sidebar_shop() {
if ( is_product('add-page-i.d-here') ) {
    remove_action('woocommerce_sidebar', 'woocommerce_get_sidebar');
    }
}

You may also want to change the layout on that product page to full width to remove the gap and reduce the width of the content area using a custom body class which you can also generate conditionally.

Woo Commerce conditional tags http://docs.woothemes.com/document/conditional-tags/