remove empty style methods of LoginWidget

IPython/html/static/auth/js/loginwidget.js

@@ -1,45 +1,43
 // Copyright (c) IPython Development Team.
 // Distributed under the terms of the Modified BSD License.
 
 define([
     'base/js/namespace',
     'base/js/utils',
     'jquery',
 ], function(IPython, utils, $){
     "use strict";
 
     var LoginWidget = function (selector, options) {
         options = options || {};
         this.base_url = options.base_url || utils.get_body_data("baseUrl");
         this.selector = selector;
         if (this.selector !== undefined) {
             this.element = $(selector);
-            this.style();
             this.bind_events();
         }
     };
 
-    LoginWidget.prototype.style = function () {};
 
 
     LoginWidget.prototype.bind_events = function () {
         var that = this;
         this.element.find("button#logout").click(function () {
             window.location = utils.url_join_encode(
                 that.base_url,
                 "logout"
             );
         });
         this.element.find("button#login").click(function () {
             window.location = utils.url_join_encode(
                 that.base_url,
                 "login"
             );
         });
     };
 
     // Set module variables
     IPython.LoginWidget = LoginWidget;
 
     return {'LoginWidget': LoginWidget};
 });