network: update comment as hashmap_free_with_destructor() does not exist anymore

Author: yuwata

src/network/netdev/netdev.c

@@ -1163,8 +1163,7 @@ int netdev_reload(Manager *manager) {
         }
 
         /* Detach old NetDev objects from Manager.
-         * Note, the same object may be registered with multiple names, and netdev_detach() may drop multiple
-         * entries. Hence, hashmap_free_with_destructor() cannot be used. */
+         * The same object may be registered with multiple names, and netdev_detach() may drop multiple entries. */
         for (NetDev *n; (n = hashmap_first(manager->netdevs)); )
                 netdev_detach(n);
 

src/network/networkd-manager.c

@@ -683,8 +683,7 @@ Manager* manager_free(Manager *m) {
         m->dhcp_pd_subnet_ids = set_free(m->dhcp_pd_subnet_ids);
         m->networks = ordered_hashmap_free(m->networks);
 
-        /* The same object may be registered with multiple names, and netdev_detach() may drop multiple
-         * entries. Hence, hashmap_free_with_destructor() cannot be used. */
+        /* The same object may be registered with multiple names, and netdev_detach() may drop multiple entries. */
         for (NetDev *n; (n = hashmap_first(m->netdevs)); )
                 netdev_detach(n);
         m->netdevs = hashmap_free(m->netdevs);