[CI] Auto commit changes from spotless

Author: elasticsearchmachine

server/src/main/java/org/elasticsearch/index/engine/ThreadPoolMergeExecutorService.java

@@ -36,16 +36,13 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
-import java.util.PriorityQueue;
 import java.util.Set;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.PriorityBlockingQueue;
 import java.util.concurrent.RejectedExecutionException;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicLong;
-import java.util.concurrent.locks.Condition;
-import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.Consumer;
 import java.util.function.LongUnaryOperator;
 import java.util.function.ToLongFunction;