Remove misleading variable from ES dependency file

VERSION variable is not used any more in the ElasticSearch dependency
file, therefore we can remove it.

Change-Id: I0e9ed69a69976606d5db5e832023e85b5a06f4f1
diff --git a/lib/elasticsearch/BUILD b/lib/elasticsearch/BUILD
index 8dc4bce..c40925e 100644
--- a/lib/elasticsearch/BUILD
+++ b/lib/elasticsearch/BUILD
@@ -26,9 +26,6 @@
     ],
 )
 
-# Java REST client for Elasticsearch.
-VERSION = "0.1.7"
-
 java_library(
     name = "jest-common",
     data = ["//lib:LICENSE-Apache2.0"],