[CI] Auto commit changes from spotless

Author: elasticsearchmachine

server/src/main/java/org/elasticsearch/common/util/CollectionUtils.java

@@ -20,7 +20,6 @@
 import java.util.Comparator;
 import java.util.IdentityHashMap;
 import java.util.List;
-import java.util.ListIterator;
 import java.util.Map;
 import java.util.Objects;
 import java.util.RandomAccess;