Harmonize user champ pj purge route to gestionnaire

config/routes.rb

@@ -284,7 +284,10 @@ Rails.application.routes.draw do
         post 'commentaire' => 'dossiers#create_commentaire'
         post 'ask_deletion'
         get 'attestation'
-        delete 'purge_champ_piece_justificative'
+
+        resources :champs, only: [] do
+          delete 'purge_champ_piece_justificative' => 'dossiers#purge_champ_piece_justificative'
+        end
       end
 
       collection do