Removes the built-in Bedrock class init validator from `load` so Bedrock
kwargs such as `base_url` and `endpoint_url` are no longer specially
rejected during deserialization.
This keeps provider-specific SSRF policy out of core; callers should
continue to avoid untrusted manifests or use restrictive
`allowed_objects`.
Verified with `make format`, `make lint`, and the focused serialization
load unit tests.
AI-assisted contribution by Open SWE.
Made by [Open SWE](https://openswe.vercel.app)
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Co-authored-by: open-swe[bot] <215916821+open-swe[bot]@users.noreply.github.com>