fix checkstyle

wenshao · wenshao · commit 3d1e00bc8688 · 2025-11-09T12:49:48.000+08:00
diff --git a/core/src/test/java/com/alibaba/fastjson2/JSONWriterUTF16Test.java b/core/src/test/java/com/alibaba/fastjson2/JSONWriterUTF16Test.java
@@ -2,7 +2,6 @@
 
 import com.alibaba.fastjson2.annotation.JSONField;
 import com.alibaba.fastjson2.util.IOUtils;
-import com.alibaba.fastjson2.util.JDKUtils;
 import com.alibaba.fastjson2.util.StringUtils;
 import org.junit.jupiter.api.Test;
 
