PubSub class is reported as deprecated by TypeScript-based lint tooling #9834

Description

When using @google-cloud/pubsub@6.3.2, the PubSub class is flagged as deprecated by lint rules that rely on TypeScript's deprecation diagnostics (specifically sonarjs/deprecation, rule S1874).

Every import and usage of PubSub produces a warning: 'PubSub' is deprecated.

We don't believe PubSub is actually intended to be deprecated — there's no replacement mentioned in the docs, and the class is used in all official examples. Is this a known issue?

Steps to Reproduce

1. Create a TypeScript project with @google-cloud/pubsub@6.3.2
2. Use PubSub: import { PubSub } from '@google-cloud/pubsub'
3. Run ESLint with the sonarjs/deprecation rule enabled
4. Every import and usage of PubSub is flagged as deprecated

Environment

• @google-cloud/pubsub: 6.3.2
• TypeScript: 5.9.3
• ESLint rule: sonarjs/deprecation (S1874)
• Node.js: 24.22.2