frontend: Minor work to make it a little less terrible

crates/frontend/public/templates/pages/calendar.html

@@ -9,6 +9,4 @@
 {% if let Some(description) = calendar.description %}<p>{{ description }}</p>{% endif%}
 
 <pre>{{ calendar|json }}</pre>
-
-<a href="/frontend/user/{{ calendar.principal }}">Back</a>
 {% endblock %}