Fix imports

Author: abravalheri

tests/test_integration.py

@@ -1,5 +1,3 @@
-import sys
-import pathlib
 import unittest
 import packaging.requirements
 import packaging.version

tests/test_py39compat.py

@@ -1,6 +1,6 @@
 import sys
-import unittest
 import pathlib
+import unittest
 
 from . import fixtures
 from importlib_metadata import (