[3.14] Remove link to the PDF downloads (GH-139142) (#139426)

Remove link to the PDF downloads (GH-139142)
(cherry picked from commit 6b5f156)

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>

Author: miss-islington

Doc/tools/templates/download.html

@@ -40,11 +40,6 @@ <h1>{% trans %}Download Python {{ dl_version }} documentation{% endtrans %}</h1>
     <th>{% trans %}Packed as .zip{% endtrans %}</th>
     <th>{% trans %}Packed as .tar.bz2{% endtrans %}</th>
   </tr>
-  <tr>
-    <td>{% trans %}PDF{% endtrans %}</td>
-    <td>{% trans download_size="17" %}<a href="{{ dl_base }}/python-{{ dl_version }}-docs-pdf-a4.zip">Download</a> (ca. {{ download_size }} MiB){% endtrans %}</td>
-    <td>{% trans download_size="17" %}<a href="{{ dl_base }}/python-{{ dl_version }}-docs-pdf-a4.tar.bz2">Download</a> (ca. {{ download_size }} MiB){% endtrans %}</td>
-  </tr>
   <tr>
     <td>{% trans %}HTML{% endtrans %}</td>
     <td>{% trans download_size="13" %}<a href="{{ dl_base }}/python-{{ dl_version }}-docs-html.zip">Download</a> (ca. {{ download_size }} MiB){% endtrans %}</td>
@@ -69,6 +64,13 @@ <h1>{% trans %}Download Python {{ dl_version }} documentation{% endtrans %}</h1>
 
 <p>{% trans %}These archives contain all the content in the documentation.{% endtrans %}</p>
 
+<p>{% trans %}
+We no longer provide pre-built PDFs of the documentation.
+To build a PDF archive, follow the instructions in the
+<a href="https://devguide.python.org/documentation/start-documenting/#building-the-documentation">Developer's Guide</a>
+and run <code>make dist-pdf</code> in the <code>Doc/</code> directory of a copy of the CPython repository.
+{% endtrans %}</p>
+
 
 <h2>{% trans %}Unpacking{% endtrans %}</h2>