def METHOD_NAME(dataset):
  """Remove missing entries.
  Some of the datasets have missing entries that sneak in as zero'd out
  feature vectors. Get rid of them.
  """
  for i, (X, y, w, ids) in enumerate(dataset.itershards()):
    available_rows = X.any(axis=1)
    print("Shard %d has %d missing entries."
        % (i, np.count_nonzero(~available_rows)))
    X = X[available_rows]
    y = y[available_rows]
    w = w[available_rows]
    ids = ids[available_rows]
    dataset.set_shard(i, X, y, w, ids)