def FakeUnlink(path):
  if os.path.isdir(path):
    raise OSError(errno.ENOENT, "Is a directory", path)
  else:
    raise OSError(errno.EPERM, "Operation not permitted", path)
@return: a PrivateCertificate instance, e.g. a certificate including a
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/dev_appserver_import_hook.py/FakeUnlink--crossover with--dataset/ETHPy150Open twisted/vertex/vertex/ivertex.py/ICertificateStorage.getPrivateCertificate