Remove marvin per JustusAdam/marvin#22
Remove marvin per JustusAdam/marvin#22

Daniel-Diaz/stackage,soenkehahn/stackage,lwm/stackage,simonmichael/stackage,ethercrow/stackage,jonschoning/stackage,phaazon/stackage,iand675/stackage,spencerjanssen/stackage,fimad/stackage,asr/stackage,clinty/stackage,wereHamster/stackage,creichert/stackage,massysett/stackage,mstksg/stackage,garetxe/stackage,int-index/stackage,mrkkrp/stackage,mgajda/stackage,fpco/stackage,Shimuuar/stackage,michalkonecny/stackage,peti/stackage,stackbuilders/stackage,athanclark/stackage