## Summary
- Removes the `isBillingEnabled` guard that was hiding the Providers and
Custom Providers sections in the Admin AI settings
- The `GET_AI_PROVIDERS` query was being skipped when billing was
enabled, and the provider UI sections were conditionally hidden —
there's no reason to gate provider configuration behind billing status
- Cleans up the now-unused `billingState` and `useAtomStateValue`
imports
## Test plan
- [ ] Verify Providers and Custom Providers sections are visible in
Admin > AI settings on cloud (billing enabled)
- [ ] Verify they remain visible on self-hosted (billing disabled)
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