no message

resources/views/vendor/adminlte/auth/login.blade.php

@@ -31,7 +31,7 @@
         <form action="{{ url('/login') }}" method="post">
             <input type="hidden" name="_token" value="{{ csrf_token() }}">
             <div class="form-group has-feedback">
-                <input type="text" class="form-control" placeholder="{{ trans('adminlte_lang::message.username') }}" name="username"/>
+                <input type="text" class="form-control" placeholder="username" name="username"/>
                 <span class="glyphicon glyphicon-user form-control-feedback"></span>
             </div>
             <div class="form-group has-feedback">