Update code_utils.py

Author: KRRT7

codeflash/code_utils/code_utils.py

@@ -119,7 +119,8 @@ def has_any_async_functions(code: str) -> bool:
 
 def cleanup_paths(paths: list[Path]) -> None:
     for path in paths:
-        if path.is_dir():
-            shutil.rmtree(path, ignore_errors=True)
-        else:
-            path.unlink(missing_ok=True)
+        if path and path.exists():
+            if path.is_dir():
+                shutil.rmtree(path, ignore_errors=True)
+            else:
+                path.unlink(missing_ok=True)