Remove confusing sidebar message during user creation

plinth/modules/users/templates/users_create.html

@@ -37,22 +37,6 @@
 
 {% endblock %}
 
-{% block sidebar %}
-
-  <div class="well sidebar">
-
-    <h3>Create User</h3>
-
-    <p>Adding a user via this administrative
-      interface <strong>might</strong> create a system user. For
-      example, if you provide a user with ssh access, she will need a
-      system account.  If you don't know what that means, don't worry
-      about it.</p>
-
-  </div>
-
-{% endblock %}
-
 {% block page_js %}
   <script>
     $('#id_username').focus();