remove "stable" version number
remove "stable" version number

dpshelio/astropy-helpers,bsipocz/astropy-helpers,larrybradley/astropy-helpers,larrybradley/astropy-helpers,Cadair/astropy-helpers,astropy/astropy-helpers,Cadair/astropy-helpers,astropy/astropy-helpers,bsipocz/astropy-helpers,larrybradley/astropy-helpers,dpshelio/astropy-helpers,bsipocz/astropy-helpers