Clarify a comment.

tests/rest/client/test_relations.py

@@ -458,6 +458,9 @@ def test_bundled_aggregations(self):
         """
         Test that annotations, references, and threads get correctly bundled.
 
+        Note that this doesn't test against /relations since only thread relations
+        get bundled via that API. See test_aggregation_get_event_for_thread.
+
         See test_edit for a similar test for edits.
         """
         # Setup by sending a variety of relations.
@@ -576,9 +579,6 @@ def assert_bundle(event_json: JsonDict) -> None:
         self.assertTrue(room_timeline["limited"])
         self._find_event_in_chunk(room_timeline["events"])
 
-        # Note that /relations is tested separately in test_aggregation_get_event_for_thread
-        # since it needs different data configured.
-
     def test_aggregation_get_event_for_annotation(self):
         """Test that annotations do not get bundled aggregations included
         when directly requested.
@@ -825,9 +825,6 @@ def assert_bundle(event_json: JsonDict) -> None:
         self.assertTrue(room_timeline["limited"])
         assert_bundle(self._find_event_in_chunk(room_timeline["events"]))
 
-        # Note that /relations is tested separately in test_aggregation_get_event_for_thread
-        # since it needs different data configured.
-
     def test_multi_edit(self):
         """Test that multiple edits, including attempts by people who
         shouldn't be allowed, are correctly handled.