f simplify

Author: TheBlueMatt

lightning/src/ln/channelmanager.rs

@@ -2951,11 +2951,9 @@ macro_rules! locked_close_channel {
 			} else {
 				let in_flight_updates = $peer_state.in_flight_monitor_updates.entry(funding_txo)
 					.or_insert_with(Vec::new);
-				in_flight_updates.iter().position(|upd| upd == &update)
-					.unwrap_or_else(|| {
-						in_flight_updates.push(update.clone());
-						0
-					});
+				if !in_flight_updates.contains(&update) {
+					in_flight_updates.push(update.clone());
+				}
 				let event = BackgroundEvent::MonitorUpdateRegeneratedOnStartup {
 					counterparty_node_id,
 					funding_txo,