Here is how you can load these files a bit differently so they appear only on the pages you need, speeding up page delivery for non-Woocommerce content.
These are loaded from /wp-content/plugins/woocommerce/assets/css/
Woo have made a filter available to remove all 3 or remove individual ones.
You can do this and just add your own CSS style
This is great but it still loads on every page, if you keep your WooCommerce on the default pages you can conditionally load the CSS file.