code: def transformer_clean():
    
    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
docs: No dropout, label smoothing, max_length.