Remove subforums on index

[Aureney]

How can I remove subforums from showing below categories like NodeBB used to do ?

[yariplus]

You can use some custom CSS to hide them.

.category-children {
    display: none;
}

Or removing this line from the theme.
https://github.com/NodeBB/nodebb-theme-persona/blob/master/templates/partials/categories/item.tpl#L16