call site 11 for path.local.remove
path/local/testing/test_local.py - line 209
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   def test_sysfind_no_permisson(self):
       dir = py.test.ensuretemp('sysfind') 
       env = py.std.os.environ
       oldpath = env['PATH']
       try:
           noperm = dir.ensure('noperm', dir=True)
           env['PATH'] += ":%s" % (noperm)
           noperm.chmod(0)
           assert py.path.local.sysfind('a') is None
               
       finally:
           env['PATH'] = oldpath
           noperm.chmod(0644)
->         noperm.remove()