fix lint

Author: vblagoje

integrations/github/tests/test_file_editor_tool.py

@@ -2,6 +2,7 @@
 #
 # SPDX-License-Identifier: Apache-2.0
 import unittest
+
 from haystack import Pipeline
 from haystack.components.agents import Agent
 from haystack.components.generators.chat import OpenAIChatGenerator
@@ -162,7 +163,7 @@ def test_pipeline_serialization(self, monkeypatch):
                         "chat_generator": {
                             "type": "haystack.components.generators.chat.openai.OpenAIChatGenerator",
                             "init_parameters": {
-                                "model": unittest.mock.ANY,  # noqa: F821
+                                "model": unittest.mock.ANY,
                                 "streaming_callback": None,
                                 "api_base_url": None,
                                 "organization": None,