fix: resolve CI/CD test failures and linting issues

tests/test_converters/test_toml.py

@@ -3,7 +3,6 @@
 import pytest
 import tempfile
 import os
-from pathlib import Path
 import sys
 
 from config_convert.converters import TOMLConverter
@@ -63,7 +62,6 @@ class TestTOMLConverter:
             os.unlink(path)
 
     def test_dump_file(self, converter, temp_dir, sample_toml):
-        import shutil
         path = tempfile.mktemp(suffix=".toml")
         try:
             if sys.version_info >= (3, 11):
@@ -75,7 +73,7 @@ class TestTOMLConverter:
             result = converter.load(path)
             assert result == data
         finally:
-            if Path(path).exists():
+            if os.path.exists(path):
                 os.unlink(path)
 
     def test_invalid_toml_raises(self, converter):