chore: Remove redundant client IP extractions on individual routes

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

@@ -181,7 +181,7 @@ type PresenceUpdates = HashMap<OwnedUserId, PresenceEventContent>;
 )]
 pub(crate) async fn sync_events_route(
 	State(services): State<crate::State>,
-	ClientIp(client_ip): ClientIp,
+	ClientIp(client_ip): ClientIp, // NOTE: Required for updating device metadata
 	body: Ruma<sync_events::v3::Request>,
 ) -> Result<sync_events::v3::Response> {
 	let sender_user = body.identity.expect_sender_user()?;