Remove (or realign) thumbnail in mini cart (neve theme)

Hello,
I have a problem with the thumbnail images of products in my mini-card : they hide/overlapse on the text of the mini cart. I would like to remove these images or redimension them so that they do not hide the text anymore.
I have tried these different codes in the custom CSS of my child theme (Neve) but it doesn’t work :
.woocommerce-mini-cart-item.mini_cart_item .cart-item-image {
display: none;
}
OR
.woocommerce table.cart .product-thumbnail { display:none !important; }

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