Remove unused

Author: jhy

src/test/java/org/jsoup/parser/TagSetTest.java

@@ -4,8 +4,6 @@
 import org.jsoup.nodes.Element;
 import org.junit.jupiter.api.Test;
 
-import java.util.concurrent.atomic.AtomicInteger;
-
 import static org.jsoup.parser.Parser.NamespaceHtml;
 import static org.junit.jupiter.api.Assertions.*;