resolve and add even more pedantic clippy lints

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/service/rooms/timeline/mod.rs

@@ -680,7 +680,7 @@ impl Service {
 			&mut pdu_json,
 			&room_version_id,
 		) {
-			Ok(_) => {},
+			Ok(()) => {},
 			Err(e) => {
 				return match e {
 					ruma::signatures::Error::PduSize => {