code: function removeSignatory (commandOptions, { accountId, publicKey }) {
    return command(
      commandOptions,
      txHelper.addCommand(
        txHelper.emptyTransaction(),
        'removeSignatory',
        {
          accountId,
          publicKey
        }
      )
    )
  }
docs: removeSignatory
  @param {Object} commandOptions
  @param {Object} args
  @property {String} args.accountId
  @property {String} args.publicKey
  @link https://iroha.readthedocs.io/en/latest/api/commands.html#remove-signatory