DEV: remove unused import

Author: angusmcleod

assets/javascripts/discourse/models/custom-wizard-step.js.es6

@@ -4,7 +4,6 @@ import { ajax } from "discourse/lib/ajax";
 import discourseComputed from "discourse-common/utils/decorators";
 import { later } from "@ember/runloop";
 import { translationOrText } from "discourse/plugins/discourse-custom-wizard/discourse/lib/wizard";
-import { extractError } from "discourse/lib/ajax-error";
 
 export default EmberObject.extend(ValidState, {
   id: null,