markRequestSetForRemoval
Marks the specified request set for removal. A request set that has been marked for removal will not be queued or checked for further status changes. Any download requests in the set that has been queued already will be removed. The request set itself will be deleted once all the requests have been removed.
Return
a list download requests that must be removed from the download queue.
Parameters
key
the primary key of the request set to be updated.