Fixed linter issues

src/subscleaner/subscleaner.py

@@ -19,10 +19,10 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 """
 
 import os
+import pathlib
 import re
 import sys
 import time
-import pathlib
 
 import chardet
 import pysrt

tests/test_subscleaner.py

@@ -1,7 +1,6 @@
 """Unit tests for the subscleaner module."""
 
 import os
-import sys
 from io import StringIO
 from pathlib import Path
 from unittest.mock import patch