Remove test_ops.py warning spew

[msaroufim]

Before

(ao) [marksaroufim@devvm17057.vll0 ~/ao (main)]$ pytest test/test_ops.py 

================================================================ test session starts ================================================================
platform linux -- Python 3.10.14, pytest-7.4.0, pluggy-1.4.0
rootdir: /home/marksaroufim/ao
plugins: hypothesis-6.100.5
collected 7 items                                                                                                                                   

test/test_ops.py .......                                                                                                                      [100%]

================================================================= warnings summary ==================================================================
../.local/lib/python3.10/site-packages/torchao/ops.py:12
  /home/marksaroufim/.local/lib/python3.10/site-packages/torchao/ops.py:12: DeprecationWarning: torch.library.impl_abstract was renamed to torch.library.register_fake. Please use that instead; we will remove torch.library.impl_abstract in a future version of PyTorch.
    @torch.library.impl_abstract("torchao::nms")

../.local/lib/python3.10/site-packages/torchao/ops.py:39
  /home/marksaroufim/.local/lib/python3.10/site-packages/torchao/ops.py:39: DeprecationWarning: torch.library.impl_abstract was renamed to torch.library.register_fake. Please use that instead; we will remove torch.library.impl_abstract in a future version of PyTorch.
    @torch.library.impl_abstract("torchao::prepack_fp6_weight")

../.local/lib/python3.10/site-packages/torchao/ops.py:52
  /home/marksaroufim/.local/lib/python3.10/site-packages/torchao/ops.py:52: DeprecationWarning: torch.library.impl_abstract was renamed to torch.library.register_fake. Please use that instead; we will remove torch.library.impl_abstract in a future version of PyTorch.
    @torch.library.impl_abstract("torchao::fp16_to_fp6")

../.local/lib/python3.10/site-packages/torchao/ops.py:77
  /home/marksaroufim/.local/lib/python3.10/site-packages/torchao/ops.py:77: DeprecationWarning: torch.library.impl_abstract was renamed to torch.library.register_fake. Please use that instead; we will remove torch.library.impl_abstract in a future version of PyTorch.
    @torch.library.impl_abstract("torchao::fp16act_fp6weight_linear")

../.local/lib/python3.10/site-packages/torchao/ops.py:98
  /home/marksaroufim/.local/lib/python3.10/site-packages/torchao/ops.py:98: DeprecationWarning: torch.library.impl_abstract was renamed to torch.library.register_fake. Please use that instead; we will remove torch.library.impl_abstract in a future version of PyTorch.
    @torch.library.impl_abstract("torchao::fp6_weight_dequant")

test/test_ops.py::TestOps::test_nms
test/test_ops.py::TestOps::test_nms
test/test_ops.py::TestOps::test_nms
  /home/marksaroufim/.local/lib/python3.10/site-packages/torch/_library/abstract_impl.py:128: UserWarning: create_unbacked_symint is deprecated, please use new_dynamic_size instead
    warnings.warn(

-- Docs: https://docs.pytest.org/en/stable/how-to/capture-warnings.html
=========================================================== 7 passed, 8 warnings in 7.85s ===========================================================
(ao) [marksaroufim@devvm17057.vll0 ~/ao (main)]$ 
(ao) [marksaroufim@devvm17057.vll0 ~/ao (main)]$ 

After

(ao) [marksaroufim@devvm17057.vll0 ~/ao (removecustomopwarnings)]$ pytest test/test_ops.py 
================================================================ test session starts ================================================================
platform linux -- Python 3.10.14, pytest-7.4.0, pluggy-1.4.0
rootdir: /home/marksaroufim/ao
plugins: hypothesis-6.100.5
collected 7 items                                                                                                                                   

test/test_ops.py .......                                                                                                                      [100%]

================================================================= 7 passed in 7.75s =================================================================
(ao) [marksaroufim@devvm17057.vll0 ~/ao (removecustomopwarnings)]$ 

[pytorch-bot]

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As of commit 9821040 with merge base 4a4e86b ():
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[janeyx99]

lgtm