Set default branding to empty

jet/templates/admin/base_site.html

@@ -0,0 +1,7 @@
+{% extends "admin/base.html" %}
+
+{% block title %}{{ title }} | {{ site_title|default:_('Django site admin') }}{% endblock %}
+
+{% block branding %}{% endblock %}
+
+{% block nav-global %}{% endblock %}