Remove out-of-date known issue
Remove out-of-date known issue

Tests *are* run on Linux now.
JosephTremoulet/corefx,ellismg/corefx,Jiayili1/corefx,nbarbettini/corefx,ViktorHofer/corefx,DnlHarvey/corefx,adamralph/corefx,kkurni/corefx,rubo/corefx,MaggieTsang/corefx,krytarowski/corefx,Priya91/corefx-1,jlin177/corefx,stone-li/corefx,elijah6/corefx,yizhang82/corefx,JosephTremoulet/corefx,wtgodbe/corefx,jhendrixMSFT/corefx,stone-li/corefx,rahku/corefx,alphonsekurian/corefx,ellismg/corefx,stone-li/corefx,JosephTremoulet/corefx,ViktorHofer/corefx,dsplaisted/corefx,iamjasonp/corefx,dotnet-bot/corefx,stone-li/corefx,cartermp/corefx,khdang/corefx,dhoehna/corefx,ViktorHofer/corefx,dhoehna/corefx,mazong1123/corefx,mokchhya/corefx,krytarowski/corefx,axelheer/corefx,yizhang82/corefx,stone-li/corefx,stone-li/corefx,manu-silicon/corefx,rahku/corefx,dotnet-bot/corefx,tijoytom/corefx,alexperovich/corefx,nbarbettini/corefx,tstringer/corefx,mazong1123/corefx,shahid-pk/corefx,mellinoe/corefx,jhendrixMSFT/corefx,tijoytom/corefx,ViktorHofer/corefx,krytarowski/corefx,krk/corefx,BrennanConroy/corefx,ericstj/corefx,JosephTremoulet/corefx,shimingsg/corefx,khdang/corefx,twsouthwick/corefx,richlander/corefx,dhoehna/corefx,manu-silicon/corefx,Petermarcu/corefx,nbarbettini/corefx,khdang/corefx,ellismg/corefx,benpye/corefx,parjong/corefx,shahid-pk/corefx,shimingsg/corefx,Jiayili1/corefx,ViktorHofer/corefx,DnlHarvey/corefx,yizhang82/corefx,richlander/corefx,billwert/corefx,pallavit/corefx,wtgodbe/corefx,seanshpark/corefx,mellinoe/corefx,the-dwyer/corefx,parjong/corefx,khdang/corefx,rahku/corefx,shmao/corefx,ellismg/corefx,axelheer/corefx,Ermiar/corefx,nbarbettini/corefx,weltkante/corefx,shimingsg/corefx,twsouthwick/corefx,Ermiar/corefx,parjong/corefx,mmitche/corefx,tijoytom/corefx,SGuyGe/corefx,rjxby/corefx,billwert/corefx,benjamin-bader/corefx,fgreinacher/corefx,shahid-pk/corefx,ravimeda/corefx,manu-silicon/corefx,gkhanna79/corefx,marksmeltzer/corefx,YoupHulsebos/corefx,elijah6/corefx,cartermp/corefx,axelheer/corefx,stone-li/corefx,lggomez/corefx,yizhang82/corefx,ericstj/corefx,mokchhya/corefx,iamjasonp/corefx,tijoytom/corefx,iamjasonp/corefx,cartermp/corefx,Priya91/corefx-1,manu-silicon/corefx,jhendrixMSFT/corefx,shmao/corefx,richlander/corefx,weltkante/corefx,gkhanna79/corefx,shmao/corefx,krytarowski/corefx,kkurni/corefx,josguil/corefx,nchikanov/corefx,Chrisboh/corefx,zhenlan/corefx,shmao/corefx,benpye/corefx,ptoonen/corefx,krk/corefx,elijah6/corefx,Chrisboh/corefx,cydhaselton/corefx,shimingsg/corefx,wtgodbe/corefx,nchikanov/corefx,shimingsg/corefx,tijoytom/corefx,mazong1123/corefx,ravimeda/corefx,lggomez/corefx,nbarbettini/corefx,mafiya69/corefx,billwert/corefx,alphonsekurian/corefx,fgreinacher/corefx,YoupHulsebos/corefx,krk/corefx,elijah6/corefx,MaggieTsang/corefx,JosephTremoulet/corefx,YoupHulsebos/corefx,benjamin-bader/corefx,rubo/corefx,benpye/corefx,mellinoe/corefx,tstringer/corefx,nbarbettini/corefx,zhenlan/corefx,marksmeltzer/corefx,ptoonen/corefx,shimingsg/corefx,adamralph/corefx,ptoonen/corefx,ellismg/corefx,stephenmichaelf/corefx,parjong/corefx,benjamin-bader/corefx,rahku/corefx,ravimeda/corefx,marksmeltzer/corefx,twsouthwick/corefx,krytarowski/corefx,BrennanConroy/corefx,Priya91/corefx-1,mafiya69/corefx,mellinoe/corefx,benpye/corefx,Chrisboh/corefx,BrennanConroy/corefx,YoupHulsebos/corefx,jcme/corefx,dsplaisted/corefx,wtgodbe/corefx,rubo/corefx,nchikanov/corefx,stephenmichaelf/corefx,alexperovich/corefx,alexperovich/corefx,mazong1123/corefx,pallavit/corefx,Chrisboh/corefx,alexperovich/corefx,janhenke/corefx,cydhaselton/corefx,ericstj/corefx,Jiayili1/corefx,elijah6/corefx,rjxby/corefx,dhoehna/corefx,kkurni/corefx,alphonsekurian/corefx,billwert/corefx,billwert/corefx,weltkante/corefx,ericstj/corefx,nchikanov/corefx,janhenke/corefx,elijah6/corefx,manu-silicon/corefx,benpye/corefx,janhenke/corefx,MaggieTsang/corefx,krk/corefx,YoupHulsebos/corefx,DnlHarvey/corefx,ptoonen/corefx,weltkante/corefx,rjxby/corefx,krk/corefx,Priya91/corefx-1,janhenke/corefx,Jiayili1/corefx,ellismg/corefx,lggomez/corefx,mmitche/corefx,wtgodbe/corefx,DnlHarvey/corefx,jhendrixMSFT/corefx,rahku/corefx,weltkante/corefx,alphonsekurian/corefx,seanshpark/corefx,the-dwyer/corefx,mmitche/corefx,mafiya69/corefx,zhenlan/corefx,ravimeda/corefx,mazong1123/corefx,dotnet-bot/corefx,axelheer/corefx,Ermiar/corefx,rahku/corefx,khdang/corefx,stephenmichaelf/corefx,jcme/corefx,shmao/corefx,wtgodbe/corefx,Ermiar/corefx,josguil/corefx,gkhanna79/corefx,mmitche/corefx,zhenlan/corefx,dhoehna/corefx,ptoonen/corefx,mellinoe/corefx,richlander/corefx,dotnet-bot/corefx,khdang/corefx,mafiya69/corefx,SGuyGe/corefx,cartermp/corefx,marksmeltzer/corefx,stephenmichaelf/corefx,yizhang82/corefx,zhenlan/corefx,Jiayili1/corefx,richlander/corefx,seanshpark/corefx,alexperovich/corefx,manu-silicon/corefx,seanshpark/corefx,iamjasonp/corefx,Priya91/corefx-1,mellinoe/corefx,jlin177/corefx,YoupHulsebos/corefx,seanshpark/corefx,Petermarcu/corefx,weltkante/corefx,marksmeltzer/corefx,Petermarcu/corefx,ravimeda/corefx,cydhaselton/corefx,ericstj/corefx,mazong1123/corefx,ViktorHofer/corefx,rjxby/corefx,benjamin-bader/corefx,gkhanna79/corefx,pallavit/corefx,billwert/corefx,the-dwyer/corefx,josguil/corefx,parjong/corefx,zhenlan/corefx,MaggieTsang/corefx,rahku/corefx,ravimeda/corefx,jcme/corefx,iamjasonp/corefx,cartermp/corefx,wtgodbe/corefx,nbarbettini/corefx,mokchhya/corefx,tstringer/corefx,MaggieTsang/corefx,dotnet-bot/corefx,Ermiar/corefx,shahid-pk/corefx,pallavit/corefx,richlander/corefx,Ermiar/corefx,janhenke/corefx,benpye/corefx,parjong/corefx,kkurni/corefx,tijoytom/corefx,fgreinacher/corefx,rubo/corefx,shahid-pk/corefx,jcme/corefx,fgreinacher/corefx,alphonsekurian/corefx,jlin177/corefx,pallavit/corefx,mmitche/corefx,mafiya69/corefx,dhoehna/corefx,iamjasonp/corefx,SGuyGe/corefx,josguil/corefx,gkhanna79/corefx,krk/corefx,jlin177/corefx,alphonsekurian/corefx,cartermp/corefx,the-dwyer/corefx,dsplaisted/corefx,cydhaselton/corefx,seanshpark/corefx,lggomez/corefx,cydhaselton/corefx,benjamin-bader/corefx,kkurni/corefx,twsouthwick/corefx,jlin177/corefx,kkurni/corefx,gkhanna79/corefx,DnlHarvey/corefx,alexperovich/corefx,jcme/corefx,pallavit/corefx,rjxby/corefx,the-dwyer/corefx,YoupHulsebos/corefx,marksmeltzer/corefx,ravimeda/corefx,SGuyGe/corefx,Petermarcu/corefx,JosephTremoulet/corefx,shmao/corefx,lggomez/corefx,zhenlan/corefx,adamralph/corefx,ericstj/corefx,tijoytom/corefx,nchikanov/corefx,seanshpark/corefx,SGuyGe/corefx,tstringer/corefx,Petermarcu/corefx,jlin177/corefx,DnlHarvey/corefx,axelheer/corefx,the-dwyer/corefx,ViktorHofer/corefx,manu-silicon/corefx,twsouthwick/corefx,weltkante/corefx,axelheer/corefx,jhendrixMSFT/corefx,Petermarcu/corefx,shimingsg/corefx,mokchhya/corefx,mafiya69/corefx,shahid-pk/corefx,mazong1123/corefx,lggomez/corefx,josguil/corefx,twsouthwick/corefx,shmao/corefx,jhendrixMSFT/corefx,the-dwyer/corefx,parjong/corefx,Priya91/corefx-1,krytarowski/corefx,Petermarcu/corefx,SGuyGe/corefx,mmitche/corefx,josguil/corefx,krk/corefx,yizhang82/corefx,ptoonen/corefx,mokchhya/corefx,benjamin-bader/corefx,gkhanna79/corefx,tstringer/corefx,krytarowski/corefx,rjxby/corefx,cydhaselton/corefx,jlin177/corefx,alexperovich/corefx,marksmeltzer/corefx,nchikanov/corefx,DnlHarvey/corefx,iamjasonp/corefx,JosephTremoulet/corefx,mokchhya/corefx,rubo/corefx,stephenmichaelf/corefx,ericstj/corefx,rjxby/corefx,mmitche/corefx,stephenmichaelf/corefx,ptoonen/corefx,elijah6/corefx,MaggieTsang/corefx,lggomez/corefx,Jiayili1/corefx,dhoehna/corefx,richlander/corefx,nchikanov/corefx,billwert/corefx,jcme/corefx,twsouthwick/corefx,cydhaselton/corefx,janhenke/corefx,Chrisboh/corefx,alphonsekurian/corefx,tstringer/corefx,Ermiar/corefx,jhendrixMSFT/corefx,dotnet-bot/corefx,Jiayili1/corefx,dotnet-bot/corefx,yizhang82/corefx,Chrisboh/corefx,MaggieTsang/corefx,stephenmichaelf/corefx