Remove the warning icon from the save warning

wagtail/admin/templates/wagtailadmin/pages/_unsaved_changes_warning.html

@@ -1,9 +1,6 @@
 {% load wagtailadmin_tags i18n %}
 <li class="footer__container footer__container--hidden footer__save-warning" data-unsaved-warning>
     <div hidden data-unsaved-type="any" class="footer__save-warning footer__emphasise-span-tags">
-        <span>
-            {% icon name="warning" class_name="default footer__emphasis" %}
-        </span>
         <div>
             <b hidden data-unsaved-type="edits">{% blocktrans %}You have <span>unsaved edits</span>{% endblocktrans %}</b>
             <b hidden data-unsaved-type="comments">{% blocktrans %}You have <span>unsaved comments</span>{% endblocktrans %}</b>