TST: constants pickle test clean-up
TST: constants pickle test clean-up

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