🧹 Remove unused private method deleteExpiredLockQuietly

[tomdesair]

🎯 What: Removed the unused private method deleteExpiredLockQuietly in S3LockingService.java.
💡 Why: This method was dead code that was not referenced anywhere in the class or package. Removing it improves codebase maintainability and reduces unnecessary complexity.
✅ Verification: Ran mvn test -Dtest="S3*" and the complete unit test suite successfully. Code was statically checked and automatically formatted using fmt-maven-plugin.
✨ Result: A slightly cleaner and leaner S3LockingService class without dangling dead code.

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PR created automatically by Jules for task 17093593079984785927 started by @tomdesair

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[coveralls]

Coverage is 94.654% — improvement/remove-unused-deleteexpiredlockquietly-17093593079984785927 into master. No base build found for master.