Revert D22939119: [TensorExpr] Fix a way we were createing np arrays in tests.
Test Plan: revert-hammer
Differential Revision:
D22939119 (https://github.com/pytorch/pytorch/commit/882ad117cfcb2d4f63dc6016d7fdbd432de21e20)
Original commit changeset: 3388270af8ea
fbshipit-source-id: 7c8d159586ce2c4c21184fd84aa6da5183bc71ea
