fix(#176): review: comment

pallets/smith-members/src/lib.rs

@@ -458,7 +458,7 @@ impl<T: Config> Pallet<T> {
                         idty_index: receiver,
                     });
                 }
-                // TODO: unschedule old expiry
+                // TODO: (optimization) unschedule old expiry
             }
         });
     }