fix: resolve CI linting failures by removing unused imports

tests/test_parsers.py

@@ -1,7 +1,5 @@
-import pytest
 from pathlib import Path
 import tempfile
-import os
 
 from config_auditor.discovery import ConfigDiscovery
 from config_auditor.parsers import ParserFactory, JsonParser, YamlParser, TomlParser
@@ -10,7 +8,6 @@ from config_auditor.rules import (
     DeprecatedPackageRule,
     OutdatedVersionRule,
     MissingTypeCheckingRule,
-    SecurityVulnerabilityRule,
     MissingScriptsRule,
     PythonProjectMetaRule,
 )