MINOR: connections: Don't mark conn flags 0x00000001 and 0x00000002 as unused.

Remove the comments saying 0x00000001 and 0x00000002 are unused, they are
now used by CO_FL_SAFE_LIST and CO_FL_IDLE_LIST.
diff --git a/include/types/connection.h b/include/types/connection.h
index 4f02895..98f7638 100644
--- a/include/types/connection.h
+++ b/include/types/connection.h
@@ -144,8 +144,6 @@
 	CO_FL_IDLE_LIST     = 0x00000002,  /* 2 = in idle_list, 3 = invalid */
 	CO_FL_LIST_MASK     = 0x00000003,  /* Is the connection in any server-managed list ? */
 
-	/* unused : 0x00000001 */
-	/* unused : 0x00000002 */
 	/* unused : 0x00000004, 0x00000008 */
 
 	/* unused : 0x00000010 */