Remove 'astropy' substitution from rst_epilog since it is already defined in sphinx-astropy
Remove 'astropy' substitution from rst_epilog since it is already defined in sphinx-astropy

[docs only]

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