/// <param name="key">The ID of the option to delete.</param>
/// <returns>True if operation is successful. Otherwise, false.</returns>
/// <feature>http://tizen.org/feature/iot.ocf</feature>
/// <param name="key">The ID of the option to delete.</param>
/// <returns>True if operation is successful. Otherwise, false.</returns>
/// <feature>http://tizen.org/feature/iot.ocf</feature>