Remove 1.8 support test code
Remove 1.8 support test code

ASnow/jbuilder,sue445/jbuilder,suryasnath/Venture,vincentwoo/jbuilder,maclover7/jbuilder,jasnow/jbuilder,WellframeInc/jbuilder,rails/jbuilder,nambrot/jbuilder,odedniv/jbuilder