test: remove redacted thinking test due Claude 3.7 Sonnet retirement

[anakin87]

Related Issues

Failing tests: https://github.com/deepset-ai/haystack-core-integrations/actions/runs/22205440411/job/64228162432

Claude Sonnet 3.7 has been retired yesterday: https://platform.claude.com/docs/en/about-claude/model-deprecations#2025-10-28-claude-sonnet-3-7-model

Proposed Changes:

• remove the redacted thinking test: Claude 4 does not produce redacted thinking
  • unclear on Anthropic docs, said explicitly in Bedrock-Claude docs
  • I also tried to make Claude 4 models produce redacted thinking but I was not able to do that

How did you test it?

CI

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.

[sjrl]

Thanks! I really hope they just remove as a thing since it's annoying to work with XD

[sjrl]

@anakin87 should we also remove explicit handling of the redacted thinking blocks in the code at some point?

[anakin87]

@anakin87 should we also remove explicit handling of the redacted thinking blocks in the code at some point?

Good idea. I'll open an issue to track that.

#2864