Change pre code css in markdown

templates/problem/yaml.html

@@ -1,20 +1,5 @@
 {% extends "base.html" %}
 
 {% block body %}
-  <div class="source-wrap">
-    <table>
-      <tr>
-        <td class="source-ln">
-          <div>
-            {% for line in raw_source.split('\n') %}
-              <a href="#line-{{ loop.index }}" name="line-{{ loop.index }}">
-                <pre>{{ loop.index }}</pre>
-              </a>
-            {% endfor %}
-          </div>
-        </td>
-        <td class="source-code">{{ highlighted_source }}</td>
-      </tr>
-    </table>
-  </div>
+  {{ highlighted_source }}</td>
 {% endblock %}