Remove flash[:error] block from public messages template
Remove flash[:error] block from public messages template

The app doesn't generate flash[:error] messages for public consumption
so there's no need to have this code in the messages template.

StatesOfJersey/e-petitions,alphagov/e-petitions,unboxed/e-petitions,alphagov/e-petitions,oskarpearson/e-petitions,oskarpearson/e-petitions,alphagov/e-petitions,StatesOfJersey/e-petitions,unboxed/e-petitions,unboxed/e-petitions,joelanman/e-petitions,oskarpearson/e-petitions,unboxed/e-petitions,alphagov/e-petitions,joelanman/e-petitions,joelanman/e-petitions,StatesOfJersey/e-petitions,StatesOfJersey/e-petitions