Remove duplicated utilities in cadence backend

[skrtskrtfb]

Summary: Remove duplicated utilities between pass_utils and utils.py

Reviewed By: zonglinpeng

Differential Revision: D67184440

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/7462

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❌ 2 New Failures

As of commit f4722c1 with merge base d3e58b0 ():

NEW FAILURES - The following jobs have failed:

• Check Labels / Check labels (gh)
  RuntimeError: Error checking labels: PR does not have required labels
• Lint / lintrunner / linux-job (gh)
  >>> Lint for backends/cadence/aot/utils.py:

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[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D67184440

[github-actions]

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[swolchok]

propagating accept from the diff. @skrtskrtfb do we still need this?

[github-actions]

Looks like this PR hasn't been updated in a while so we're going to go ahead and mark this as Stale.
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[github-actions]

Looks like this PR hasn't been updated in a while so we're going to go ahead and mark this as Stale.
Feel free to remove the Stale label if you feel this was a mistake.
If you are unable to remove the Stale label please contact a maintainer in order to do so.
If you want the bot to never mark this PR stale again, add the no-stale label.
Stale pull requests will automatically be closed after 30 days of inactivity.