Remove unneed code marking in monitor-amazon-sqs section

[OrekiYuta]

https://www.elastic.co/guide/en/observability/current/monitor-amazon-sqs.html

remove unuse var marker

[cla-checker-service[bot]]

💚 CLA has been signed

[github-actions[bot]]

A documentation preview will be available soon.

• 🔨 Buildkite builds
• 📚 HTML diff
• 📙 Preview page

Request a new doc build by commenting

* Rebuild this PR: `run docs-build` * Rebuild this PR and all Elastic docs: `run docs-build rebuild` _{`run docs-build` is much faster than `run docs-build rebuild`. A `rebuild` should only be needed in rare situations. If your PR continues to fail for an unknown reason, the doc build pipeline may be broken. Elastic employees can check the pipeline status [here](https://buildkite.com/elastic/docs-build).}

[bmorelli25]

Thanks, @OrekiYuta. Can you please fill out the CLA linked above.

[bmorelli25]

run docs-build

[OrekiYuta]

Hi @bmorelli25 , All checks have passed, could you help to approving review? thanks a lot!

[bmorelli25]

💚 All backports created successfully

Status	Branch	Result
✅	main

Note: Successful backport PRs will be merged automatically after passing CI.

Questions ?

Please refer to the Backport tool documentation