remove Discourse namespacing from preview spec
remove Discourse namespacing from preview spec

discourse/onebox,billy3321/onebox,tarzan/onebox,techAPJ/onebox,tarzan/onebox,tarzan/onebox,techAPJ/onebox,discourse/onebox,aceofspades/onebox,aceofspades/onebox,billy3321/onebox,techAPJ/onebox,fantasticfears/onebox,riking/onebox,aceofspades/onebox,billy3321/onebox