hivectl: the open verb is gone and the docs say what hivectl has

hive-c0re/src/server.rs

@@ -200,8 +200,7 @@ async fn dispatch(req: &HostRequest, coord: Arc<Coordinator>) -> HostResponse {
             // The hive domain + per-surface public URLs are injected into
             // c0re's service env by the hyperhive module; surface them so the
             // operator CLI can fill in this hive's own identity (the
-            // federation peer-config block) and open the web surfaces
-            // (`hivectl open`).
+            // federation peer-config block).
             HostRequest::Urls => HostResponse::urls(hive_urls()),
             HostRequest::QuotaEnable => handle_quota_enable().await?,
             HostRequest::QuotaLimit { name, limit } => {