Remove ImageType support in boto since it is not actually supported in the EC2 API.
Remove ImageType support in boto since it is not actually supported in the EC2 API.

s0enke/boto,bleib1dj/boto,abridgett/boto,darjus-amzn/boto,rjschwei/boto,disruptek/boto,SaranyaKarthikeyan/boto,alex/boto,kouk/boto,appneta/boto,dablak/boto,pfhayes/boto,ekalosak/boto,dimdung/boto,j-carl/boto,Timus1712/boto,jindongh/boto,drbild/boto,TiVoMaker/boto,cyclecomputing/boto,khagler/boto,zachmullen/boto,ryansb/boto,FATruden/boto,clouddocx/boto,ric03uec/boto,weka-io/boto,acourtney2015/boto,ddzialak/boto,rayluo/boto,yangchaogit/boto,elainexmas/boto,lochiiconnectivity/boto,jotes/boto,dablak/boto,ramitsurana/boto,andresriancho/boto,kouk/boto,garnaat/boto,awatts/boto,Pretio/boto,weebygames/boto,jamesls/boto,shipci/boto,rosmo/boto,jameslegg/boto,Asana/boto,revmischa/boto,vijaylbais/boto,shaunbrady/boto,jameslegg/boto,trademob/boto,nishigori/boto,felix-d/boto,drbild/boto,lra/boto,serviceagility/boto,alex/boto,disruptek/boto,ocadotechnology/boto,bryx-inc/boto,rjschwei/boto,tpodowd/boto,podhmo/boto,nexusz99/boto,tpodowd/boto,campenberger/boto,andresriancho/boto,israelbenatar/boto,appneta/boto,alfredodeza/boto,stevenbrichards/boto,janslow/boto,jamesls/boto,nikhilraog/boto,lochiiconnectivity/boto,zzzirk/boto,varunarya10/boto,vishnugonela/boto