🧹 Remove unused imports from Config.java

[sayore]

🎯 What: Removed genuinely unused imports from Config.java including ModConfigEvent, Set, Collectors, Item, SubscribeEvent, and EventBusSubscriber.
💡 Why: Reduces visual clutter, complies with Java best practices, and improves the overall maintainability and readability of the Config.java file by ensuring only necessary dependencies are imported.
✅ Verification: Verified that the file compiles and all tests pass with ./gradlew test and ./gradlew classes. Code Review evaluated the change and rated it #Correct# since it is clean and safe to remove unused imports.
✨ Result: A cleaner config class without unnecessary imports.

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PR created automatically by Jules for task 10847824023976822264 started by @sayore

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