manager: remove dead code (#65163)

combo/manager/views.py

@@ -668,16 +668,6 @@ page_add_cell = PageAddCellView.as_view()
 class PageEditCellView(ManagedPageMixin, UpdateView):
     http_method_names = ['post']
 
-    def get_template_names(self):
-        return [self.template_name or self.object.manager_form_template]
-
-    def get_context_data(self, **kwargs):
-        context = super().get_context_data(**kwargs)
-        context.update(self.get_object().get_extra_manager_context())
-        context['cell'] = self.get_object()
-        context['page'] = context['cell'].page
-        return context
-
     def get_object(self, queryset=None):
         page_pk = self.kwargs.get('page_pk')
         cell_reference = self.kwargs.get('cell_reference')
@@ -751,18 +741,6 @@ class PageEditCellView(ManagedPageMixin, UpdateView):
             )
         return JsonResponse(response)
 
-    def form_valid(self, form):
-        if self.request.is_ajax():
-            self.object = form.save()
-            form = self.get_form_class()(instance=self.object, prefix=self.get_prefix())
-            response = self.form_invalid(form)  # avoid redirection
-        else:
-            response = super().form_valid(form)
-        PageSnapshot.take(
-            self.object.page, request=self.request, comment=_('changed cell "%s"') % self.object
-        )
-        return response
-
 
 page_edit_cell = PageEditCellView.as_view()