Question juridique clé
Whether the federal appeal had become moot after the applicant withdrew the building permit request.
Solution extraite
The appeal was moot because the withdrawal of the permit application rendered the challenged permit and the prior cantonal decisions without object.
Motifs extraits
The respondent's declaration was interpreted as a withdrawal of the application for building permission. This extinguished the subject matter of the appeal and also deprived the lower-court decisions of their object.