Remove non-TLS support

assets/templates/version.njk

@@ -10,11 +10,6 @@
    without this document being rebuilt, so the value only becomes current on
    the next full load -- which is the reload you would do to check it anyway.
 
-   version is null in one case: boot.html composed this page, so there was no
-   worker to ask. Nothing is rendered at all then, which is the honest answer
-   -- no worker means no version, and the bookmark slot in the navbar is empty
-   for the same reason. app.js finds no element and leaves it at that.
-
    Rendered on every page and shown under the book list alone. Populating it
    only for the index would look like the smaller change and would not work:
    the shell is composed once per full navigation, and a boosted link to the
@@ -22,10 +17,8 @@
    decides, not the composer -- app.js looks for the index in #content after
    every swap. The body class this was rendered with cannot be asked, for the
    same reason: it goes stale the moment a link is clicked. #}
-{%- if version %}
 <div class="app-version d-none text-center mt-5 mb-2" id="app-version">
   <p class="app-version-digests form-text m-0">
     shell {{ version.shell }} &middot; library {{ version.library }}
   </p>
 </div>
-{%- endif %}