Remove unit check from NDDataArray.uncertainty.setter
Remove unit check from NDDataArray.uncertainty.setter

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