perf: Delayed drop is probably unnecessary

src/api/client/sync/v3/joined.rs

@@ -66,7 +66,6 @@ pub(super) async fn load_joined_room(
 	*/
 
 	let insert_lock = services.rooms.timeline.mutex_insert.lock(room_id).await;
-	#[cfg(feature = "sync-drop-instant")]
 	drop(insert_lock);
 	let (
 		account_data,
@@ -85,8 +84,6 @@ pub(super) async fn load_joined_room(
 	)
 	.boxed()
 	.await?;
-	#[cfg(not(feature = "sync-drop-instant"))]
-	drop(insert_lock);
 
 	if !timeline.is_empty() || !state_events.is_empty() {
 		trace!(