Remove mirage in preview environment
Remove mirage in preview environment

We don't need mirage here, the API for demo is used.

jrjohnson/frontend,thecoolestguy/frontend,djvoa12/frontend,ilios/frontend,dartajax/frontend,dartajax/frontend,ilios/frontend,thecoolestguy/frontend,jrjohnson/frontend,djvoa12/frontend