Revert "Delete unused import statement for Executorch TOSA dialect (#…

[psiddh]

…12269)"

This reverts commit 9327708.

Summary

[PLEASE REMOVE] See CONTRIBUTING.md's Pull Requests for ExecuTorch PR guidelines.

[PLEASE REMOVE] If this PR closes an issue, please add a Fixes #<issue-id> line.

[PLEASE REMOVE] If this PR introduces a fix or feature that should be the upcoming release notes, please add a "Release notes: " label. For a list of available release notes labels, check out CONTRIBUTING.md's Pull Requests.

Test plan

[PLEASE REMOVE] How did you test this PR? Please write down any manual commands you used and note down tests that you have written if applicable.

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/12301

• 📄 Preview Python docs built from this PR

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❌ 1 Cancelled Job, 33 Pending, 3 Unrelated Failures

As of commit aaa317a with merge base 7e33791 ():

CANCELLED JOB - The following job was cancelled. Please retry:

• pull / test-models-linux-basic (vit, xnnpack-quantization-delegation, cmake, linux.2xlarge, executorch-u... / linux-job (gh)

FLAKY - The following jobs failed but were likely due to flakiness present on trunk:

• pull / test-models-linux (emformer_transcribe, xnnpack-quantization-delegation, linux.2xlarge) / linux-job (gh) (detected as infra flaky with no log or failing log classifier)
• pull / unittest-editable / linux / linux-job (gh) (matched linux rule in flaky-rules.json)
  The runner has received a shutdown signal. This can happen when the runner service is stopped, or a manually started runner is canceled.

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

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

• pull / test-eval_llama-mmlu-linux / linux-job (gh) (trunk failure)
  RuntimeError: Dataset scripts are no longer supported, but found mmlu_no_train.py

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