ikiwiki: Consistent styling for delete warning page

- Do not use subsubmenu styling for delete confirmation page. This will make it
  consistent with the rest of the UI where confirmation pages are shown. Also
  showing a confirmation under a tab is confusing.

- Undo incorrect styling changes.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>

plinth/modules/ikiwiki/templates/ikiwiki_delete.html

@@ -1,4 +1,4 @@
-{% extends "service-subsubmenu.html" %}
+{% extends "base.html" %}
 {% comment %}
 #
 # This file is part of FreedomBox.
@@ -21,7 +21,7 @@
 {% load bootstrap %}
 {% load i18n %}
 
-{% block configuration %}
+{% block content %}
 
   <h3>
     {% blocktrans trimmed %}

plinth/modules/ikiwiki/views.py

@@ -160,9 +160,5 @@ def delete(request, name):
     return TemplateResponse(
         request, 'ikiwiki_delete.html', {
             'title': ikiwiki.name,
-            'clients': ikiwiki.clients,
-            'description': ikiwiki.description,
-            'manual_page': ikiwiki.manual_page,
-            'subsubmenu': subsubmenu,
             'name': name
         })