Fixed linter errors.

plugins/datasource-zabbix/datasource.js

@@ -34,6 +34,7 @@ function (angular, _, dateMath) {
 
     // Initialize cache service
     this.zabbixCache = new ZabbixCache(this.zabbixAPI);
+    console.log(this.zabbixCache);
 
     /**
      * Test connection to Zabbix API

plugins/datasource-zabbix/zabbixCacheSrv.js

@@ -7,11 +7,9 @@ function (angular, _) {
 
   var module = angular.module('grafana.services');
 
-  module.factory('ZabbixCache', function($q, backendSrv) {
+  module.factory('ZabbixCache', function($q) {
 
     function ZabbixCache(zabbixAPI, lifetime) {
-      var self = this;
-
       this.zabbixAPI = zabbixAPI;
       this.lifetime = lifetime;