Remove legacy replication endpoint for resyncing devices

[krish-bista]

replacing the old device_resync with the new multi_ version of it.

Pull Request Checklist

• Pull request is based on the develop branch
• Pull request includes a changelog file. The entry should:
  • Be a short description of your change which makes sense to users. "Fixed a bug that prevented receiving messages from other servers." instead of "Moved X method from EventStore to EventWorkerStore.".
  • Use markdown where necessary, mostly for code blocks.
  • End with either a period (.) or an exclamation mark (!).
  • Start with a capital letter.
  • Feel free to credit yourself, by adding a sentence "Contributed by @github_username." or "Contributed by [Your Name]." to the end of the entry.
• Pull request includes a sign off
• Code style is correct
  (run the linters)

[clokep]

@krish-bista Could you please sign-off on your contribution?

[clokep]

Removing from the review queue until there's sign-off.

[clokep]

Closing due to lack of response / sign-off.