ner: cnn+lstm and bigru mod ，The code is the same

[weil0258]

The code is the same：in
layer_stack = [
L.Bidirectional(L.GRU(**config['layer_bgru']), name='layer_bgru'),
L.Dropout(**config['layer_dropout'], name='layer_dropout'),
L.TimeDistributed(L.Dense(output_dim, **config['layer_time_distributed']), name='layer_time_distributed'),
L.Activation(**config['layer_activation'])
]

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