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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 transformer_clean():
 """No dropout, label smoothing, max_length."""

  hparams = transformer_base_v2()
  hparams.label_smoothing = 0.0
  hparams.layer_prepostprocess_dropout = 0.0
  hparams.attention_dropout = 0.0
  hparams.relu_dropout = 0.0
  hparams.max_length = 0
  return hparams