Delete functorch's monkeypatching (#85430)
By upstreaming functorch's tensor printing logic into PyTorch. There's
no way of creating a custom print function for a TensorImpl subclass (as
opposed to a torch_dispatch or torch_function tensor subclass, which can
just override repr()) right now, so we need to directly interpose inside
regular Tensor printing in PyTorch.
Monkey patching is bad; users do not expect `import blah` to change
something about another library.
Fixes https://github.com/pytorch/functorch/issues/900
Test Plan:
- existing tests
Pull Request resolved: https://github.com/pytorch/pytorch/pull/85430
Approved by: https://github.com/ezyang
