ElasticVersion: remove redundant private modifier

Before this change, IntelliJ showed a warning about the hereby removed
private access modifier being redundant -for such enum constructors.
Remove that warning while removing this modifier, private by default.

Change-Id: I1809303434ba8bc4b79fdd4322e8de8d60d107ce

gerrit-elasticsearch/src/main/java/com/google/gerrit/elasticsearch/ElasticVersion.java

diff --git a/gerrit-elasticsearch/src/main/java/com/google/gerrit/elasticsearch/ElasticVersion.java b/gerrit-elasticsearch/src/main/java/com/google/gerrit/elasticsearch/ElasticVersion.java
index ff26382..b65eb31 100644
--- a/gerrit-elasticsearch/src/main/java/com/google/gerrit/elasticsearch/ElasticVersion.java
+++ b/gerrit-elasticsearch/src/main/java/com/google/gerrit/elasticsearch/ElasticVersion.java
@@ -25,7 +25,7 @@
   private final String version;
   private final Pattern pattern;
 
-  private ElasticVersion(String version) {
+  ElasticVersion(String version) {
     this.version = version;
     this.pattern = Pattern.compile(version);
   }