call site 15 for path.local.remove
path/local/testing/test_local.py - line 52
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   def test_remove_removes_dir_and_readonly_file(self):
       readonly_dir = self.tmpdir.join('readonlydir').ensure(dir=1)
       readonly_file = readonly_dir.join('readonlyfile').ensure()
       readonly_file.chmod(0)
->     readonly_dir.remove()
       assert not readonly_dir.check(exists=1)