refactor: remove forum and topic feature chains

src/Content/PayOrders.php

@@ -26,7 +26,7 @@ trait PayOrders {
         if ($post_id <= 0) {
             return;
         }
-        // Only count normal posts (content pay), not necessarily forum topics.
+        // Only count normal posts for content purchases.
         $post = get_post($post_id);
         if (!($post instanceof \WP_Post) || $post->post_type !== 'post') {
             return;