bootstrap 5 template updates

netbox/templates/ipam/ipaddress.html

@@ -3,7 +3,6 @@
 {% load plugins %}
 {% load render_table from django_tables2 %}
 
-{% block header %}
 {% block breadcrumbs %}
   <li class="breadcrumb-item"><a href="{% url 'ipam:ipaddress_list' %}">IP Addresses</a></li>
   {% if object.vrf %}
@@ -11,7 +10,6 @@
   {% endif %}
   <li class="breadcrumb-item">{{ object }}</li>
 {% endblock %}
-{% endblock %}
 
 {% block content %}
 <div class="row">