Fix spotless complaint

Author: garydgregory

log4j-core/src/main/java/org/apache/logging/log4j/core/filter/CompositeFilter.java

@@ -21,7 +21,6 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.concurrent.TimeUnit;
-
 import org.apache.logging.log4j.Level;
 import org.apache.logging.log4j.Marker;
 import org.apache.logging.log4j.core.AbstractLifeCycle;