Deletes a file request permanently.
The access token received from the authorization server in the OAuth 2.0 flow.
The unique identifier that represent a file request.
The ID for any file request can be determined
by visiting a file request builder in the web application
and copying the ID from the URL. For example,
for the URL https://*.app.box.com/filerequest/123
the file_request_id is 123.
Returns an empty response when the file request has been successfully deleted.