Remove hack to prevent vanishing statistics button when modifying the builder object on root

Change-Id: I89d7df6d303983918e16b8b04b34895df5466897
diff --git a/dev/js/src/vc/docgroup.js b/dev/js/src/vc/docgroup.js
index d3097e9..7ce2fed 100644
--- a/dev/js/src/vc/docgroup.js
+++ b/dev/js/src/vc/docgroup.js
@@ -13,12 +13,10 @@
 ], function (jsonldClass,
 	           unspecClass,
 	           docClass,
-            docGroupRefClass) {
+             docGroupRefClass) {
 
   const _validGroupOpRE = new RegExp("^(?:and|or)$");
 
-  const loc = KorAP.Locale;
-
   const docGroupClass = {
     _ldType : "docGroup",