changelog update removing "ic_*" method reference.
changelog update removing "ic_*" method reference.

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