style: Fix up some TODOs

src/service/rooms/event_handler/fetch_prev.rs

@@ -88,7 +88,7 @@ impl super::Service {
 		for (i, event_id) in to_persist.iter().enumerate() {
 			debug!(
 				elapsed=?start.elapsed(),
-				"[TODO] Persisting fetched prev event: {event_id} ({}/{})",
+				"Persisting fetched prev event: {event_id} ({}/{})",
 				i.saturating_add(1),
 				to_persist.len(),
 			);

src/service/rooms/event_handler/fetch_state.rs

@@ -282,7 +282,6 @@ impl super::Service {
 	/// state events as outliers, for use later.
 	///
 	/// Any events that cannot be persisted are dropped with a warning.
-	/// TODO: make it noisy?
 	pub(super) async fn fetch_full_state(
 		&self,
 		origin: &ServerName,

src/service/rooms/event_handler/handle_outlier_pdu.rs

@@ -170,8 +170,6 @@ impl super::Service {
 					)));
 				}
 			}
-			// TODO: do events received from auth chain need persisting? that
-			// sounds awfully slow
 		}
 
 		// 6. Reject "due to auth events" if the event doesn't pass auth based on the