[bridge 71] remove stale comments (#17162)

## Description 

Removed inaccurate comments. They were correct until we changed the type
of watermark.

## Test plan 

How did you test the new or updated feature?

---

## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] Indexer: 
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:

crates/sui-bridge/src/sui_syncer.rs

@@ -1,8 +1,8 @@
 // Copyright (c) Mysten Labs, Inc.
 // SPDX-License-Identifier: Apache-2.0
 
-//! The SuiSyncer module is responsible for synchronizing Events emitted on Sui blockchain from
-//! concerned bridge packages.
+//! The SuiSyncer module is responsible for synchronizing Events emitted
+//! on Sui blockchain from concerned modules of bridge package 0x9.
 
 use crate::{
     error::BridgeResult,
@@ -19,8 +19,6 @@ use tokio::{
     time::{self, Duration},
 };
 
-// TODO: use the right package id
-// const PACKAGE_ID: ObjectID = SUI_SYSTEM_PACKAGE_ID;
 const SUI_EVENTS_CHANNEL_SIZE: usize = 1000;
 
 /// Map from contract address to their start cursor (exclusive)
@@ -100,10 +98,6 @@ where
 
             let len = events.data.len();
             if len != 0 {
-                // Note: it's extremely critical to make sure the SuiEvents we send via this channel
-                // are complete per transaction level. Namely, we should never send a partial list
-                // of events for a transaction. Otherwise, we may end up missing events.
-                // See `sui_client.query_events_by_module` for how this is implemented.
                 events_sender
                     .send((module.clone(), events.data))
                     .await