Remove the unused 'var current = controller.getCurrent();' line as per @jedp's suggestion.

resources/static/test/cases/shared/modules/interaction_data.js

@@ -250,7 +250,6 @@
     createController();
     network.withContext(function() {
       mediator.publish("kpi_data", { number_emails: 1 });
-      var current = controller.getCurrent();
       testHelpers.testObjectValuesEqual(controller.getCurrent(), {
         number_emails: 1
       });