Remove Merchant API v1beta references before relying on cutover readiness.

Check package manifests, lockfiles, generated clients, endpoint paths, service wrappers, and build scripts for Merchant API v1beta usage.

Verify that the production artifact imports Merchant API v1 code and that tests no longer depend on v1beta resource fixtures.

Downgrade README-only, comment-only, fixture-only, or archived sample matches when context shows they are not executable code.

Scope limitation: static analysis cannot confirm live Merchant Center API behavior without optional live validation.