{% load i18n %}
{% load url from future %}
<div id="user_info" class="pull-right">
  <span>{% blocktrans with username=request.user.username %}Logged in as: {{ username }}{% endblocktrans %}</span>
  {% if HORIZON_CONFIG.help_url %}
  <a href="{{ HORIZON_CONFIG.help_url }}" target="_new">{% trans "Help" %}</a>
  {% endif %}
  <a href="{% url 'logout' %}">{% trans "Sign Out" %}</a>
  {% include "horizon/common/_region_selector.html" %}
</div>

{% load i18n %}
{% load url from future %}
<div id="user_info" class="pull-right">
  <span>{% blocktrans with username=request.user.username %}Logged in as: {{ username }}{% endblocktrans %}</span>
  {% if HORIZON_CONFIG.help_url %}
  <a href="{{ HORIZON_CONFIG.help_url }}" target="_new">{% trans "Help" %}</a>
  {% endif %}
  <a href="{% url 'logout' %}">{% trans "Sign Out" %}</a>
</div>

Remove region selector and comment out AVAILABLE_CONTROLLERS
Remove region selector and comment out AVAILABLE_CONTROLLERS
