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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _remove_old_stderr_files(self):

 """
 Remove stderr files left by previous Spyder instances.
 
 This is only required on Windows because we can't
 clean up stderr files while Spyder is running on it.
 """

        if os.name == 'nt':
            tmpdir = get_temp_dir()
            for fname in os.listdir(tmpdir):
                if osp.splitext(fname)[1] == '.stderr':
                    try:
                        os.remove(osp.join(tmpdir, fname))
                    except Exception:
                        pass