netbox-community-netbox/netbox/utilities/templates/buttons/bulk_delete.html

{% load i18n %}
{% if url %}
  <button type="submit" name="_delete" {% formaction %}="{{ url }}" class="btn btn-red">
    <i class="mdi mdi-trash-can-outline" aria-hidden="true"></i> {% trans "Delete Selected" %}
  </button>
{% endif %}