message: [tf.data] Rename private `filter_irregular_batches()` function with leading underscore.
  Its functionality has been subsumed by the `drop_remainder` arguments to `Dataset.batch()`, `Dataset.padded_batch()` and `tf.contrib.data.map_and_batch()`.
diff: @@ -175,7 +175,7 @@ def unbatch():
  return _apply_fn
  -def filter_irregular_batches(batch_size):
  +def _filter_irregular_batches(batch_size):
  """Transformation that filters out batches that are not of size batch_size."""
  def _apply_fn(dataset):
  @@ -254,7 +254,7 @@ def batch_and_drop_remainder(batch_size):
  # TODO(jsimsa): Switch to using `batch(..., drop_remainder=True)` any time
  # after 6/30/2018.
  batched = dataset.batch(batch_size)
  - return filter_irregular_batches(batch_size)(batched)
  + return _filter_irregular_batches(batch_size)(batched)
  return _apply_fn
  @@ -293,7 +293,7 @@ def padded_batch_and_drop_remainder(batch_size,
  # any time after 6/30/2018.
  batched = dataset.padded_batch(
  batch_size, padded_shapes=padded_shapes, padding_values=padding_values)
  - return filter_irregular_batches(batch_size)(batched)
  + return _filter_irregular_batches(batch_size)(batched)
  return _apply_fn
  