[CI] Auto commit changes from spotless

Author: elasticsearchmachine

server/src/main/java/org/elasticsearch/transport/OutboundHandler.java

@@ -31,7 +31,6 @@
 import org.elasticsearch.common.recycler.Recycler;
 import org.elasticsearch.common.transport.NetworkExceptionHelper;
 import org.elasticsearch.common.util.concurrent.ThreadContext;
-import org.elasticsearch.core.Nullable;
 import org.elasticsearch.core.RefCounted;
 import org.elasticsearch.core.Releasable;
 import org.elasticsearch.core.Releasables;