Remove outdated v3 release announcement bullet from release notes

[aryannikhil]

Fixes #3208

This PR removes the outdated v3 release announcement bullet point from the release notes.

No code changes were made — so unit tests, API docs, and coverage do not apply.

TODO:

• Add unit tests and/or doctests in docstrings (N/A)
• Add docstrings and API docs for any new/modified user-facing classes and functions (N/A)
• New/modified features documented in docs/user-guide/*.rst (N/A)
• Changes documented as a new file in changes/ (N/A)
• GitHub Actions have all passed
• Test coverage is 100% (Codecov passes)

[d-v-b]

resolving #3208 requires removing the actual banner. this PR removes the line in the changelog that announces the addition of the banner. We don't want to change the changelog.

[aryannikhil]

@d-v-b
Update: I’ve now removed the actual announcement banner by deleting the announcement line in conf.py, so the banner will no longer appear at the top of the docs.

This fully addresses the feedback about not just removing the bullet point but removing the active banner itself.

Please take a look when you get a chance, happy to make any further tweaks if needed. Thanks for the guidance!

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.62%. Comparing base (2420f9e) to head (5a6205d).
⚠️ Report is 104 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3235   +/-   ##
=======================================
  Coverage   94.62%   94.62%           
=======================================
  Files          78       78           
  Lines        8690     8690           
=======================================
  Hits         8223     8223           
  Misses        467      467           

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[dstansby]

Thanks - looks good, but we don't want to lose the old changelog entry.

[dstansby]

Please can you remove this change - we want to keep the old changelog entry?

[aryannikhil]

I’ve restored the changelog entry as requested and confirmed the banner removal as discussed.
All changes are now in sync with the main branch, ready for your review!
Please let me know if there’s anything else you’d like adjusted.

Thanks for the feedback and guidance!

[dstansby]

Thanks a lot!