ElasticContainer: remove unused private constant

Change-Id: I1bcd7843221107ce0d8bbb9cbde815bcf64514fe
diff --git a/src/test/java/com/google/gerrit/elasticsearch/ElasticContainer.java b/src/test/java/com/google/gerrit/elasticsearch/ElasticContainer.java
index caacba4..36f91cc 100644
--- a/src/test/java/com/google/gerrit/elasticsearch/ElasticContainer.java
+++ b/src/test/java/com/google/gerrit/elasticsearch/ElasticContainer.java
@@ -27,7 +27,6 @@
 /* Helper class for running ES integration tests in docker container */
 public class ElasticContainer extends ElasticsearchContainer {
   private static FluentLogger logger = FluentLogger.forEnclosingClass();
-  private static final int ELASTICSEARCH_DEFAULT_PORT = 9200;
 
   public static ElasticContainer createAndStart(ElasticVersion version) {
     @SuppressWarnings("resource")