Fix deprecation warning
Fix deprecation warning

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