Remove Tensor.h include from TensorIterator.h (#64167)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/64167
Test Plan: Imported from OSS
Reviewed By: saketh-are
Differential Revision: D30728579
Pulled By: dagitses
fbshipit-source-id: 3888da00c9c8030013c8f4b39d300fe671defb05
