Remove CPU_tensor_parallel_kernel_apply2 (#20207)
Summary:
This code is unused and has been superseded by TensorIterators.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20207
Differential Revision: D15240832
Pulled By: cpuhrsch
fbshipit-source-id: 4f600bb8645f9b28a137e2cefb099978f5152d05
