[How to] Hide “Uncategorized” Category on WordPress // WP Assist
— Read on www.google.com/amp/s/wpassist.me/remove-unwanted-uncategorized-links-from-your-posts/amp/
Edit functions.php:
function remove_uncategorized_links( $categories ){ foreach ( $categories as $cat_key => $category ){ if( 1 == $category->term_id ){ unset( $categories[ $cat_key ] ); } } return $categories; } add_filter('get_the_categories', 'remove_uncategorized_links', 1);