fix todo

aws/sdk/integration-tests/s3/tests/stalled-stream-protection.rs

@@ -282,12 +282,10 @@ async fn test_stalled_stream_protection_for_downloads_is_enabled_by_default() {
         "minimum throughput was specified at 1 B/s, but throughput of 0 B/s was observed"
     );
     // 5s grace period
-    // TODO(https://github.com/smithy-lang/smithy-rs/issues/3510): Currently comparing against 5 and 6 due to
-    // the behavior change in #3485. Once that feature/fix is released, this should be changed to only check for 5.
     let elapsed_secs = start.elapsed().as_secs();
     assert!(
-        elapsed_secs == 5 || elapsed_secs == 6,
-        "elapsed secs should be 5 or 6, but was {elapsed_secs}"
+        elapsed_secs == 5,
+        "elapsed secs should be 5, but was {elapsed_secs}"
     )
 }