unmemoize media type.
unmemoize media type.

we should try not to cache things unless we really need to.

davydovanton/rack,Eric-Guo/rack,wildjcrt/rack,deepj/rack,imtayadeway/rack,imtayadeway/rack,davydovanton/rack,shaneog/rack,rwz/rack,jackxxu/rack,deepj/rack,deepj/rack,eins78/rack,imtayadeway/rack,akihiro17/rack,Eric-Guo/rack,gioele/rack,eins78/rack,wjordan/rack,akihiro17/rack,maclover7/rack,jackxxu/rack,rwz/rack,supzann3/rack,eins78/rack,nmk/rack,laplaceliu/rack,wjordan/rack,laplaceliu/rack,davidcelis/rack,ngpestelos/rack,gfvcastro/rack,shaneog/rack,wildjcrt/rack,tylergannon/rack,rwz/rack,gioele/rack,tylergannon/rack,liamseanbrady/rack,shaneog/rack,maclover7/rack,wildjcrt/rack,maclover7/rack,nmk/rack,tylergannon/rack,davidcelis/rack,keepcosmos/rack,gioele/rack,liamseanbrady/rack,liamseanbrady/rack,supzann3/rack,davidcelis/rack,wjordan/rack,davydovanton/rack,Eric-Guo/rack,gfvcastro/rack,laplaceliu/rack,jackxxu/rack,ngpestelos/rack,supzann3/rack,keepcosmos/rack,ngpestelos/rack,nmk/rack,keepcosmos/rack,akihiro17/rack,gfvcastro/rack