remove old deprecation warning message
remove old deprecation warning message

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