Update admonition block template

templates/admonition.html.erb

@@ -1,16 +1,10 @@
 <div<%= @id && %( id="#{@id}") %> class="<%= ['admonitionblock',(attr :name),role].compact * ' ' %>">
   <table>
     <tr>
-      <td class="icon"><%
-        if document.attr? :icons, 'font' %>
-      <i class="icon-<%= attr 'name' %>" title="<%= @caption %>"></i><%
-        elsif document.attr? :icons %>
+      <td class="icon" title="<%= @caption %>">
         <svg class="icon">
           <use href="<%= icon_uri(attr :name) %>#<%= attr :name %>" alt="<%= @caption %>"></use>
-      </svg><%
-        else %>
-      <div class="title"><%= @caption %></div><%
-        end %>
+        </svg>
       </td>
       <td class="content"><%
         if title? %>