If you see this notice in your dashboard, even after you've done all available updates, there is nothing to worry about. Each time there is a WooCommerce update you will see this notice by the time we release the new theme update. Your site performance shouldn't be affected in any way.
"Your theme contains copies of some outdated WooCommerce template files. These files may need to be changed to ensure they are compatible with the current version of WooCommerce."