Fix all Python linting issues

- Remove all whitespace from blank lines
- Remove trailing whitespace
- Add missing newlines at end of files
- Remove unused imports
- Clean up formatting in start_runpod.py and runpod_handler.py

runpod_handler.py

@@ -5,12 +5,11 @@ Optimized for the new ComfyUI features and performance improvements
 """
 
 import os
-import json
 import time
 import logging
 import tempfile
 import requests
-from typing import Dict, Any, Optional
+from typing import Dict, Any
 import runpod
 
 # Configure logging

start_runpod.py

@@ -8,7 +8,6 @@ import sys
 import logging
 import subprocess
 import time
-from pathlib import Path
 
 # Logging setup
 logging.basicConfig(