fix: resolve CI linting failures by removing unused imports

tests/test_fixes.py

@@ -1,7 +1,5 @@
-import pytest
 from pathlib import Path
 import tempfile
-import os
 
 from config_auditor.fixes import (
     Fixer,
@@ -84,7 +82,7 @@ class TestFixer:
             config_path.write_text(content)
 
             fixer = Fixer(dry_run=True)
-            fix_count = fixer.fix_config(config_path, "json", content)
+            fixer.fix_config(config_path, "json", content)
 
             actual_content = config_path.read_text()
             assert actual_content == content