Tab still active after plugin deactivation

Hi,

I′ve installed the plugin but decided to uninstall it.

I created a few custom tabs for my product page but after removing the plugin there is still one active from those I created: “Size & Fit”. I′ve deleted the folder directly from the server and purge all the cache. I think it made changes directly into the woocommerce template as it appears in all product pages. How can I remove this custom tab?

Thank you.

The page I need help with: [log in to see the link]