fix flake8 warnings

invokeai/app/services/invocation_services.py

@@ -1,6 +1,6 @@
 # Copyright (c) 2022 Kyle Schouviller (https://github.com/kyle0654) and the InvokeAI Team
 from __future__ import annotations
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Optional
 
 if TYPE_CHECKING:
     from logging import Logger

invokeai/backend/model_manager/download/base.py

@@ -7,7 +7,7 @@ from abc import ABC, abstractmethod
 from enum import Enum
 from functools import total_ordering
 from pathlib import Path
-from typing import List, Optional, Callable, Dict, Any
+from typing import List, Optional, Callable
 from pydantic import BaseModel, Field
 from pydantic.networks import AnyHttpUrl
 

tests/test_model_download.py

@@ -125,11 +125,11 @@ session.mount(
     TestAdapter(
         model_index_content,
         status=200,
-        headers={"Content-Length": len(model_index_content), "Content-Disposition": f'filename="model_index.json"'},
+        headers={"Content-Length": len(model_index_content), "Content-Disposition": 'filename="model_index.json"'},
     ),
 )
 
-########################################################################################3
+# ================================================================================================================== #
 
 
 def test_basic_queue_download():