ref(litellm): Remove dead attributes

[alexander-alderman-webb]

Description

The api_base, api_version and custom_llm_provider values are stored in litellm_params and are not passed as top level keyword arguments to litellm.input_callback callbacks. See https://github.com/BerriAI/litellm/blob/5e80e075c7d12a816bea9bc4f6fed4c876aae9c8/litellm/litellm_core_utils/litellm_logging.py#L414.

The attributes were therefore not set.

Issues

Reminders

• Please add tests to validate your changes, and lint your code using tox -e linters.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

[github-actions]

Semver Impact of This PR

🟢 Patch (bug fixes)

📋 Changelog Preview

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New Features ✨

• (ai) Redact base64 data URLs in image_url content blocks by ericapisani in #5953
• (integrations) Instrument pyreqwest tracing by servusdei2018 in #5682

Bug Fixes 🐛

Anthropic

• Capture exceptions for stream() calls by alexander-alderman-webb in #5950
• Stop setting transaction status when child span fails by alexander-alderman-webb in #5717
• Only finish relevant spans in .create() patches by alexander-alderman-webb in #5716

Pydantic Ai

• Adapt import for new library versions by alexander-alderman-webb in #5984
• Use first-class hooks when available by alexander-alderman-webb in #5947

Other

• (wsgi) Respect HTTP_X_FORWARDED_PROTO in request.url construction by sl0thentr0py in #5963

Internal Changes 🔧

• (ai) Remove gen_ai.tool.type span attribute by ericapisani in #5964
• (anthropic) Separate sync and async .create() patches by alexander-alderman-webb in #5715

• (litellm) Remove dead attributes by alexander-alderman-webb in #5985

• (openai) Split token counting by API for easier deprecation by ericapisani in #5930
• (opentelemetry) Ignore mypy error by alexander-alderman-webb in #5927
• 🤖 Update test matrix with new releases (04/13) by github-actions in #5983
• Fix license metadata in setup.py by sl0thentr0py in #5934
• Update validate-pr workflow by stephanie-anderson in #5931

Other

• Handle None span context in the span processor and pin tokenizers version for anthropic tests on Python 3.8 by alexander-alderman-webb in #5967

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