Remove unused LoginHelper class.

/**

 * Generates the login form for both in header and at the end of

 * comments list.

 *

 * When form is submitted, Docs.controller.Auth#login method is called.

 */

Ext.define('Docs.view.auth.LoginHelper', {

    singleton: true,

    loginTplHtml: [

        '<form class="loginForm">',

            '<input class="username" type="text" name="username" placeholder="Username" />',

            '<input class="password" type="password" name="password" placeholder="Password" />',

            '<label><input type="checkbox" name="remember" /> Remember Me</label>',

            '<input class="submit" type="submit" value="Sign in" />',

            ' or ',

            '<a class="register" href="http://www.sencha.com/forum/register.php" target="_blank">Register</a>',

        '</form>'

    ],

    /**

     * Renders the form inside Login component in header.

     * @param {Ext.Element/HTMLElement} el

     */

    renderToHeader: function(el) {

        var tpl = Ext.create('Ext.Template', this.loginTplHtml.join(''));

        tpl.overwrite(el, {});

        this.bindSubmit(el);

    },

    /**

     * Renders the form at the end of comments list.

     * @param {Ext.Element/HTMLElement} el

     */

    renderToComments: function(el) {

        if (Ext.isIE && Ext.ieVersion <= 7) {

            var tpl = Ext.create('Ext.XTemplate',

                '<div class="new-comment">',

                    '<span class="toggleNewComment"><span></span>Sorry, ',

                    'adding comments is not supported in IE 7 or earlier</span>',

                '</div>'

            );

        }

        else {

            var tpl = Ext.create('Ext.XTemplate',

                '<div class="new-comment">',

                    '<span class="toggleNewComment"><span></span>Sign in to post a comment:</span>',

                    this.loginTplHtml.join(''),

                '</div>'

            );

        }

        tpl.overwrite(el, {});

        this.bindSubmit(el);

    },

    bindSubmit: function(el) {

        Ext.get(el).down("form").on("submit", this.submitLogin, this, {preventDefault: true});

    },

    // Gathers values from form and passes to Auth controller

    submitLogin: function(event, el) {

        var form = Ext.get(el);

        var username = form.down('input[name=username]').getValue();

        var password = form.down('input[name=password]').getValue();

        var rememberEl = form.down('input[name=remember]');

        var submitEl = form.down('input[type=submit]');

        var remember = rememberEl ? Boolean(rememberEl.getAttribute('checked')) : false;

        Docs.App.getController('Auth').login(username, password, remember, submitEl);

    }

});