Follow-up: Migrate away from `deprecated_notes.js`

Summary

We should investigate if we can migrate away from and remove the code for deprecated_notes.

Key questions:

• Is this still being used?
• Should we migrate the jquery to native js?
• Can we remove the file?

Background

The following discussion from !107087 (merged) should be addressed:

• @ekigbo started a discussion: (+1 comment)

  question: do we have an issue to migrate this file away from jquery as well? It would be great to add one.