Remove sigma_clip function Signature
Remove sigma_clip function Signature

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