<script charset=…>, <script type=…>, and <style type=…> are “obsolete
but conforming” in HTML5. They make the validator.nu output noisier
and real problems a little harder to find.
(type was required in HTML 4, which is not relevant to us.)
Signed-off-by: Anders Kaseorg <andersk@mit.edu>
This commit moves the stylesheets under the archive bundle in
the Django pipeline to being compiled by webpack instead. It
also removes a remaining call to a portico stylesheet that no
longer exists.