Move from mathjax to katex

templates/user/preview.html

@@ -1,4 +1 @@
-{{ preview_data|markdown|reference|str|safe }}
-{% if REQUIRE_JAX %}
-  <div data-config="{{ static('mathjax3_config.js') }}" class="require-mathjax-support"></div>
-{% endif %}
+{{ preview_data|markdown|reference|str|safe }}

templates/user/user-about.html

@@ -185,10 +185,6 @@
 {% endblock %}
 
 {% block bodyend %}
-  {% if REQUIRE_JAX %}
-    {% include "mathjax-load.html" %}
-  {% endif %}
-
   <script type="text/javascript">
     var submission_activity = {{ submission_data }};
     var metadata = {{ submission_metadata }};