Update archive message

src/get-started/updating-your-code/index.md

@@ -3,31 +3,5 @@ title: Replace variables, functions and mixins from our old frameworks
 layout: layout-archived.njk
 ignoreInSitemap: true
 ---
-{% extends "layout-single-page.njk" %}
 
-{% set title = title + ' (archived)' %}
-
-{% block head %}
-  {{ super() }}
-  {# Make sure redirect pages are not indexed by search engines #}
-  <meta name="robots" content="noindex">
-{% endblock %}
-
-{% set contents %}
-  <div class="govuk-grid-row">
-    <div class="govuk-grid-column-two-thirds">
-      <h1 class="govuk-heading-xl">This page has been archived</h1>
-
-      <div class="app-prose-scope">
-        {{ contents | safe}}
-
-        <p>
-          See an <a href="https://frontend.design-system.service.gov.uk/">archived version of this page</a> as part of GOV.UK Frontend v4.x.
-          
-          You can also <a href="https://webarchive.nationalarchives.gov.uk/*/https://design-system.service.gov.uk/{{ permalink }}">
-            check for previous versions of this page in the UK Government Web Archive</a>.
-        </p>
-      </div>
-    </div>
-  </div>
-{% endset %}
+In December 2023, we archived this page as GOV.UK Frontend v5.x no longer supports our legacy frameworks.