remove old code and fix comments
remove old code and fix comments

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