Questione giuridica chiave
Whether the appeal should be discontinued because it was withdrawn
Decisione estratta
The proceedings are discontinued and the appeal is struck off the docket following withdrawal.
Motivazione estratta
Under Art. 71 BGG in conjunction with Art. 73 Abs. 1 BZP and Art. 32 Abs. 2 BGG, the appeal must be written off once withdrawn.