message: Use tf.nn.selu in keras activations
diff: @@ -153,9 +153,7 @@ def selu(x):
  [Self-Normalizing Neural Networks (Klambauer et al, 2017)]
  (https://arxiv.org/abs/1706.02515)
  """
  - alpha = 1.6732632423543772848170429916717
  - scale = 1.0507009873554804934193349852946
  - return scale * K.elu(x, alpha)
  + return nn.selu(x)
  @keras_export('keras.activations.softplus')
  