[CI] Auto commit changes from spotless

Author: elasticsearchmachine

server/src/test/java/org/elasticsearch/index/engine/ThreadPoolMergeExecutorServiceDiskSpaceTests.java

@@ -28,7 +28,6 @@
 import org.elasticsearch.threadpool.ThreadPool;
 import org.junit.After;
 import org.junit.AfterClass;
-import org.junit.Before;
 import org.junit.BeforeClass;
 
 import java.io.IOException;