Remove unnecessary imports
Remove unnecessary imports

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