Removing know issue for old numpy and very old astropy [skip appveyor] [docs only]
Removing know issue for old numpy and very old astropy [skip appveyor] [docs only]

stargaser/astropy,saimn/astropy,StuartLittlefair/astropy,MSeifert04/astropy,funbaker/astropy,astropy/astropy,aleksandr-bakanov/astropy,funbaker/astropy,StuartLittlefair/astropy,StuartLittlefair/astropy,mhvk/astropy,lpsinger/astropy,larrybradley/astropy,funbaker/astropy,pllim/astropy,saimn/astropy,larrybradley/astropy,saimn/astropy,dhomeier/astropy,bsipocz/astropy,larrybradley/astropy,bsipocz/astropy,DougBurke/astropy,stargaser/astropy,pllim/astropy,astropy/astropy,saimn/astropy,AustereCuriosity/astropy,stargaser/astropy,DougBurke/astropy,lpsinger/astropy,AustereCuriosity/astropy,mhvk/astropy,bsipocz/astropy,aleksandr-bakanov/astropy,StuartLittlefair/astropy,funbaker/astropy,MSeifert04/astropy,larrybradley/astropy,pllim/astropy,AustereCuriosity/astropy,dhomeier/astropy,astropy/astropy,dhomeier/astropy,StuartLittlefair/astropy,DougBurke/astropy,lpsinger/astropy,AustereCuriosity/astropy,mhvk/astropy,larrybradley/astropy,saimn/astropy,pllim/astropy,bsipocz/astropy,mhvk/astropy,mhvk/astropy,pllim/astropy,AustereCuriosity/astropy,dhomeier/astropy,astropy/astropy,aleksandr-bakanov/astropy,aleksandr-bakanov/astropy,astropy/astropy,MSeifert04/astropy,stargaser/astropy,MSeifert04/astropy,dhomeier/astropy,lpsinger/astropy,DougBurke/astropy,lpsinger/astropy