JS: remove some needless variables

dream/platform/src/dream/Input_viewProductionLine.js

@@ -5,16 +5,14 @@
 
   function saveGraph(evt) {
     var gadget = this,
-      graph_data,
-      graph_gadget;
+      graph_data;
     return new RSVP.Queue()
       .push(function () {
         // Prevent double click
         evt.target.getElementsByClassName("ui-btn")[0].disabled = true;
         return gadget.getDeclaredGadget("productionline_graph");
       })
-      .push(function (graphgadget) {
-        graph_gadget = graphgadget;
+      .push(function (graph_gadget) {
         return graph_gadget.getData();
       })
       .push(function (data) {
@@ -26,10 +24,13 @@
         });
       })
       .push(function (body) {
-        var data = JSON.parse(body);
-        data.nodes = JSON.parse(graph_data).nodes;
-        data.edges = JSON.parse(graph_data).edges;
-        data.preference = JSON.parse(graph_data).preference;
+        var data = JSON.parse(body),
+            json_graph_data = JSON.parse(graph_data);
+
+        data.nodes = json_graph_data.nodes;
+        data.edges = json_graph_data.edges;
+        data.preference = json_graph_data.preferences;
+
         return gadget.aq_putAttachment({
           "_id": gadget.props.jio_key,
           "_attachment": "body.json",