Remove mixin tests for pandas.Series (confict w/ mask attribute)
Remove mixin tests for pandas.Series (confict w/ mask attribute)

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