Don't use autospec in a test where it fails

Signed-off-by: Aurélien Bompard <aurelien@bompard.org>

tests/test_api.py

@@ -210,7 +210,7 @@ def test_raw_exceptions_possible_sizes_not_in_list(self, grep):
         target = b"size must be in one of these:"
         assert target in resp.data, f"{target!r} not in {resp.data!r}"
 
-    @patch("datagrepper.app.dm.Message.query", autospec=True)
+    @patch("datagrepper.app.dm.Message.query")
     def test_id(self, query):
         msg = query.filter_by.return_value.first.return_value
         msg.as_dict = MagicMock(return_value={"key": "value"})