diff --git a/lib/services/groups/groupRegistryMemory.js b/lib/services/groups/groupRegistryMemory.js
index 0343905fc..033fed495 100644
--- a/lib/services/groups/groupRegistryMemory.js
+++ b/lib/services/groups/groupRegistryMemory.js
@@ -27,7 +27,6 @@ let registeredGroups = {};
 const logger = require('logops');
 const intoTrans = require('../common/domain').intoTrans;
 const errors = require('../../errors');
-const config = require('../../commonConfig');
 const _ = require('underscore');
 const context = {
     op: 'IoTAgentNGSI.InMemoryGroupRegister'
diff --git a/lib/services/groups/groupService.js b/lib/services/groups/groupService.js
index 72b74195b..d8e8a48bc 100644
--- a/lib/services/groups/groupService.js
+++ b/lib/services/groups/groupService.js
@@ -59,10 +59,6 @@ function validateGroup(group, callback) {
         config.getGroupRegistry().getSilently(group.resource, group.apikey, generateDuplicateHandler(innerCb));
     }
 
-    function checkServiceAndSubservice(innerCb) {
-        config.getGroupRegistry().find(group.service, group.subservice, generateDuplicateHandler(innerCb));
-    }
-
     function checkMandatoryParams(innerCb) {
         if (!group.service) {
             innerCb(new errors.MissingConfigParams(['service']));