Prevent the logout view to put message (behaviour inherited from django-allauth)

fixes #5734

portail_citoyen2/views.py

@@ -6,6 +6,8 @@ from django.http import HttpResponse
 from django.utils.timezone import now
 
 from django.contrib.auth import get_user_model
+from django.contrib.auth import logout as auth_logout
+
 from allauth.account.views import LogoutView
 from allauth.account.adapter import get_adapter
 
@@ -14,6 +16,11 @@ class PCLogoutView(LogoutView):
         return (self.request.REQUEST.get(self.redirect_field_name) or
                 get_adapter().get_logout_redirect_url(self.request))
 
+    def logout(self):
+        # override django-allauth behaviour to prevent it to put a
+        # message(using django.contrib.messages)
+        auth_logout(self.request)
+
 logout = PCLogoutView.as_view()
 
 def stats(request):