fix: update unchained-client openapi generator config

[0xApotheosis]

Description

The yarn workspace @shapeshiftoss/unchained-client generate command fails because the upstream unchained repo removed the Arbitrum Nova coinstack in shapeshift/unchained#1258 (merged 2026-02-09).

This PR makes three changes to openapitools.json:

• Remove the arbitrumNova generator entry — the swagger spec URL returns 404 since the coinstack was deleted upstream
• Update cosmos spec URL — point to develop branch instead of the cosmos fork branch (now merged into develop)
• Update mayachain spec URL — point to develop branch instead of the mayachain fork branch (now merged into develop)

Note: This is a minimal fix to unblock the generate command. A follow-up PR will handle the full removal of Arbitrum Nova chain support from the web app.

Issue (if applicable)

N/A — the upstream unchained repo removed arbitrum-nova in shapeshift/unchained#1258

Risk

Low. This only changes the OpenAPI code generation config. No runtime code is affected. The existing generated arbitrumNova client code remains untouched (it's gitignored and only regenerated on explicit yarn generate runs).

No protocols, transaction types, wallets or contract interactions are affected.

Testing

Engineering

1. yarn workspace @shapeshiftoss/unchained-client generate — should complete successfully with all 18 generators passing (was failing on arbitrumNova before)
2. Verify no other generators are affected

Operations

• 🏁 My feature is behind a flag and doesn't require operations testing (yet)

Summary by CodeRabbit

Release Notes

• Chores
  • Updated API generation configurations for Cosmos and Mayachain to use develop branch sources.
  • Removed ArbitrumNova configuration.

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📝 Walkthrough

Walkthrough

This PR updates the OpenAPI tools configuration for the unchained-client package by switching cosmos and mayachain API source URLs from alternative locations to the GitHub develop branch URL, and removes the unused arbitrumNova configuration block entirely.

Changes

Cohort / File(s)	Summary
API Configuration Updates packages/unchained-client/openapitools.json	Updated cosmos inputSpec from CDN URL to raw.githubusercontent.com/develop branch URL; updated mayachain inputSpec from refs/heads/mayachain to develop branch URL; removed arbitrumNova configuration block.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• feat: packages buidl cdn monkey patch #10232: Both PRs modify the same openapitools.json file and update cosmos and mayachain inputSpec URLs, though to different sources (GitHub vs. jsDelivr CDN).
• fix: update swagger link for mayachain #10795: Both PRs modify the mayachain generator inputSpec URL in the same configuration file.

Suggested reviewers

• gomesalexandre
• kaladinlight

Poem

🐰 URLs now point to develop's way,
No more arbitrum nova in play,
GitHub branches guide the flow,
Configuration's cleaner now, I'd say! 🔗

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title accurately describes the main change: updating the OpenAPI generator configuration in the unchained-client package. It directly addresses the primary objective of unblocking the generate command by updating configuration references.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/unchained-client-generate

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[0xApotheosis]

Closing in favor of #11815 which includes the full chain removal — the package dependency graph means we can't remove arbitrumNova from unchained-client without also removing it from chain-adapters and everything downstream.