🧹 Code health: Remove unused Set import in Config.java

[sayore]

🎯 What: Removed an unused import for java.util.Set in Config.java.
💡 Why: Having unused imports clutters the file and affects readability. Removing them is good code hygiene.
✅ Verification: Recompiled the project (gradle build and gradle test) and confirmed that everything works successfully.
✨ Result: Improved code cleanliness without changing behavior.

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PR created automatically by Jules for task 17436054047566506037 started by @sayore

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