The header pattern displays an empty navbar when both regions are empty

[kp77]

If both the Header left and Header right regions are empty, the header pattern still displays an empty navbar.

Currently I'm fixing this by overriding /templates/patterns/header/pattern-header.html.twig and adding this conditional in the override template:

  {% if header_left is not empty or header_right is not empty %}
    {% block content %}
      {{ content }}
    {% endblock %}
  {% endif %}

See: https://github.com/openeuropa/oe_whitelabel/blob/1.x/templates/patterns/header/pattern-header.html.twig#L40-L42

[brummbar]

We removed the header pattern as not useful.