Removal of self reference and unused import in visualization.js

client/galaxy/scripts/viz/visualization.js

@@ -5,7 +5,6 @@ import util_mod from "viz/trackster/util";
 import config_mod from "utils/config";
 import GridView from "mvc/grid/grid-view";
 import Tabs from "mvc/ui/ui-tabs";
-import Ui from "mvc/ui/ui-misc";
 /**
  * Mixin for returning custom JSON representation from toJSON. Class attribute to_json_keys defines a set of attributes
  * to include in the representation; to_json_mappers defines mappers for returned objects.
@@ -1112,9 +1111,8 @@ var TrackBrowserRouter = Backbone.Router.extend({
         this.route(/([\w\+]+\:[\d,]+-[\d,]+)$/, "change_location");
 
         // Handle navigate events from view.
-        var self = this;
-        self.view.on("navigate", new_loc => {
-            self.navigate(new_loc);
+        this.view.on("navigate", new_loc => {
+            this.navigate(new_loc);
         });
     },