Remove or Hide a Category from Home page

Hi,

On the Homepage the CATEGORIES ARE DISPLAYED however, I want to hide a category from display on the main page but keep it on the Sidebar.

I used this in the “functions.php” but it didn’t work.

function exclude_category($query) {
if ( $query->is_home() ) {
$query->set(‘cat’, ‘-347’);
}
return $query;
}
add_filter(‘pre_get_posts’, ‘exclude_category’);