Fixed unused import

Author: javadev

src/test/java/com/github/underscore/XmlBuilderTest.java

@@ -29,7 +29,6 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import org.junit.jupiter.api.Test;
-import org.w3c.dom.Document;
 
 class XmlBuilderTest {
     private static final String XML =