TST: drop superfluous call to os.fspath()

Author: dnicolodi

tests/test_sdist.py

@@ -2,7 +2,6 @@
 #
 # SPDX-License-Identifier: MIT
 
-import os
 import pathlib
 import re
 import stat
@@ -140,7 +139,7 @@ def bar():
         try:
             pathlib.Path('pure.py').write_text(new)
             pathlib.Path('other.py').touch()
-            sdist_path = mesonpy.build_sdist(os.fspath(tmp_path))
+            sdist_path = mesonpy.build_sdist(tmp_path)
         finally:
             pathlib.Path('pure.py').write_text(old)
             pathlib.Path('other.py').unlink()