Remove unused import in o.e.c.l.Releasables

core/src/main/java/org/elasticsearch/common/lease/Releasables.java

@@ -19,8 +19,6 @@
 
 package org.elasticsearch.common.lease;
 
-import org.elasticsearch.ElasticsearchException;
-
 import java.util.Arrays;
 
 /** Utility methods to work with {@link Releasable}s. */