Revert "adding API change for spin_until_complete" (backport #3333)

[mergify]

This is an automatic backport of pull request #3333 done by Mergify.
Cherry-pick of e0ec7a7 has failed:

On branch mergify/bp/humble/pr-3333
Your branch is up to date with 'origin/humble'.

You are currently cherry-picking commit e0ec7a7.
  (all conflicts fixed: run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

nothing to commit, working tree clean

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/github/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

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