message: Remove `deprecation.deprecated` for API `keras.utils.multi_gpu_model`.
diff: @@ -17,13 +17,14 @@ from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  +import warnings
  +
  from tensorflow.python.framework import ops
  from tensorflow.python.keras import backend as K
  from tensorflow.python.keras.engine.training import Model
  from tensorflow.python.keras.layers.core import Lambda
  from tensorflow.python.keras.layers.merge import concatenate
  from tensorflow.python.ops import array_ops
  -from tensorflow.python.util import deprecation
  from tensorflow.python.util.tf_export import keras_export
  @@ -37,8 +38,6 @@ def _normalize_device_name(name):
  @keras_export('keras.utils.multi_gpu_model')
  -@deprecation.deprecated(
  - '2020-04-01', 'Use `tf.distribute.MirroredStrategy` instead.')
  def multi_gpu_model(model, gpus, cpu_merge=True, cpu_relocation=False):
  """Replicates a model on different GPUs.
  @@ -154,6 +153,10 @@ def multi_gpu_model(model, gpus, cpu_merge=True, cpu_relocation=False):
  Raises:
  ValueError: if the `gpus` argument does not match available devices.
  """
  + warnings.warn('`tf.keras.utils.multi_gpu_model` is deprecated and '
  + 'should be removed on 2020-04-01. To update it, '
  + 'please use `tf.distribute.MirroredStrategy` instead.')
  +
  if isinstance(gpus, (list, tuple)):
  if len(gpus) <= 1:
  raise ValueError('For multi-gpu usage to be effective, '
  