added: commented redundant code that we may need to use in a future version of enketo-core
added: commented redundant code that we may need to use in a future version of enketo-core

https://github.com/kobotoolbox/enketo-express/issues/741

OpenClinica/enketo-express-oc,OpenClinica/enketo-express-oc,OpenClinica/enketo-express-oc