Remove comment I did by accident

schoolapps/schoolapps/urls.py

@@ -33,7 +33,7 @@ def manifest(request):
 def serviceworker(request):
     return serve(request, "common/pwabuilder-sw.js")
 
-# handler404 = 'dashboard.views.error_404'
+handler404 = 'dashboard.views.error_404'
 
 def custom_page_not_found(request):
     return defaults.page_not_found(request, None, "common/404.html")