ruff fix for setup.py

[jcaip]

att

[pytorch-bot]

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🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/ao/1833

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⏳ 23 Pending, 2 Unrelated Failures

As of commit cd52233 with merge base d4be9e4 ():

BROKEN TRUNK - The following jobs failed but were present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• Run TorchAO Experimental Tests / test-cpu-ops (macos-14) (gh) (trunk failure)
  torchao/experimental/tests/test_int8_dynamic_activation_intx_weight.py::TestInt8DynamicActivationIntxWeight::test_export_compile_aoti_PackedLinearInt8DynamicActivationIntxWeightLayout
• Run TorchAO Experimental Tests / test-mps-ops (macos-m1-stable) (gh) (trunk failure)
  AttributeError: '_OpNamespace' 'torchao' object has no attribute '_linear_fp_act_1bit_weight'

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