Revert "Merge pull request #310 from uber/cuda-iarange" (#315)
Revert "Merge pull request #310 from uber/cuda-iarange" (#315)

This reverts commit dfcfc922d608d3048174957bbdad37ad3c6010ee, reversing
changes made to a3e3741a5d5d7bc0a5115f934fbaf739fa977552.
uber/pyro,uber/pyro,uber/pyro