Remove include line related to helpers
Remove include line related to helpers

ah_bootstrap.py has been removed from the repo and should not be
included.

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