Update tests/fgpyo/util/test_metric.py

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

tests/fgpyo/util/test_metric.py

@@ -864,11 +864,7 @@ def test_assert_file_header_matches_metric(tmp_path: Path, data_and_classes: Dat
  with metric_path.open("w") as metrics_file:
  metrics_file.write("name\tage\n")
 
- try:
- _assert_file_header_matches_metric(metric_path, data_and_classes.Person, delimiter="\t")
- except Exception:
- raise AssertionError("File header should be valid") from None
-
+ _assert_file_header_matches_metric(metric_path, data_and_classes.Person, delimiter="\t")
 
 @pytest.mark.parametrize("data_and_classes", (attr_data_and_classes, dataclasses_data_and_classes))
 @pytest.mark.parametrize(