[feature] refactor: remove unused imports in sdk/v2

[modichika]

Feature Area

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[github-actions]

🤖 AI Result

Labels: kind/bug,area/sdk
Reasoning: The task is a simple cleanup of unused imports, making it suitable for newcomers and worthy of a bug label.

[github-actions]

✨ Beginner Friendly!

This issue has been tagged as a **good first issue**.
**Reason:** The issue has a small scope and involves a straightforward cleanup task with minimal risk of impacting core functionality.