[NSFW] Remove 1px line around product images woocommerce

Hello hello,

I’m trying to help out a friend with her woocommerce shop but I’m seeing a 1px line around the product images in the gallery. For the life of me I cannot find it in the CSS. I tried a number of Additional CSS codes but nothing works.

Can someone take a look and help me out on what code to add so the 1px line is gone?

Thanks sooooo much ??

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