gh-136744: Remove a redundant test skip (#139267)

Remove a redundant test skip.

Author: freakboy3742

Lib/test/test_pydoc/test_pydoc.py

@@ -1299,7 +1299,6 @@ def test_apropos_with_unreadable_dir(self):
         self.assertEqual(out.getvalue(), '')
         self.assertEqual(err.getvalue(), '')
 
-    @os_helper.skip_unless_working_chmod
     def test_apropos_empty_doc(self):
         pkgdir = os.path.join(TESTFN, 'walkpkg')
         os.mkdir(pkgdir)