message: Add barancore multihost support for tpu_estimator.py, with test.
diff: @@ -587,13 +587,6 @@ class TPUEmbedding(object):
  def _validate_generate_enqueue_ops_sparse_features_list(
  self, sparse_features_list):
  """Validate `sparse_features_list`."""
  - if len(sparse_features_list) != self._num_cores:
  - raise ValueError('Length of `sparse_features_list` should match the '
  - 'number of cores; '
  - '`len(sparse_features_list)` is {}, '
  - 'number of cores is {}.'.format(
  - len(sparse_features_list), self._num_cores))
  -
  feature_set = set(self._feature_to_table_dict.keys())
  contiguous_device = None
  for i, sparse_features in enumerate(sparse_features_list):
  