Revert D30846958: [caffe2/aten] Remove loose #pragma warning ( pop ) in TensorBase.h
Test Plan: revert-hammer
Differential Revision:
D30846958 (https://github.com/pytorch/pytorch/commit/40098f48a1a37a06a456fd642d908ca522295706)
Original commit changeset: 52a3fb66e426
fbshipit-source-id: 1d749f6981756f2169d6867538555a945cbb8ca6
