CS-16499: removed useless txn.commit statement. Used to call it to ensure that the lock() on nic object will get removed even in case when we don't do the DB update. But our Transaction code does it automatic

server/src/com/cloud/network/NetworkManagerImpl.java

@@ -2261,9 +2261,6 @@ public class NetworkManagerImpl implements NetworkManager, NetworkService, Manag
                 updateNic(nic, network.getId(), -1);
                 txn.commit();
             }
-        } else {
-            //commiting the empty transaction here as we have to release the lock we've held
-            txn.commit();
         }
     }