fix: remove accidental __mocks__ files causing CI format failure

- Remove __mocks__/remotes/ directory that was accidentally committed
- Fixes CI checkout-install step failure on format check
- These files were interfering with native-federation-tests

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: ScriptedAlchemy