/// <summary>
 /// Deletes the authenticated user's subscription to a given thread.
 /// </summary>
 /// <param name="id">The Id of the thread to delete subscription from.</param>
 /// <remarks>http://developer.github.com/v3/activity/notifications/#delete-a-thread-subscription</remarks>
 /// <returns></returns>
 public IObservable <Unit> DeleteThreadSubscription(int id)
 {
     return(_notificationsClient.DeleteThreadSubscription(id).ToObservable());
 }