remove unused parameter

Author: jjmason

lib/conjur/authz.js

@@ -185,8 +185,7 @@ module.exports = {
        * graph( roleIds, options, callback )
        */
       graph: function (account, roleIds, options, callback) {
-        var params = {},
-            fromRoleParam,
+        var fromRoleParam,
             path;
 
         if(typeof options === 'function') {