How to remove All Blog category from mobile nav

Hello,
I use a blog with different categories (Reviews, inspiratie and kennis).
When I open the menu with my mobile phone I also see the category All Blog.
Does anyone have a code or other solution to remove this category?

https://www.duurzaamkiezen.com/

You can use this to Website Tools > Custom CSS

.container.header-menu-nav-item.header-menu-nav-item--external:has(a[href="/blog"]) {
    display: none;
}