Remove non-TLS support

utils/compile_bible.py

@@ -23,9 +23,8 @@ different jobs and the seam is where a second output format would attach:
   WRITING     That tree becomes one semantic fragment per book: a <title> and
               one root element carrying data-template, not a document. The
               shell around it is assembled from the nunjucks templates in
-              assets/templates/ -- by the service worker, or by boot.html when
-              there can never be one -- so chrome changes never require running
-              this. The markup carries structure and no presentation: every
+              assets/templates/ by the service worker, so chrome changes never
+              require running this. The markup carries structure and no presentation: every
               USFM distinction survives as a class or data attribute, so the
               whole corpus can be restyled from the stylesheet without being
               regenerated.