dashboard: fix copypaste error in disk-list-element template

circle/dashboard/templates/dashboard/_disk-list-element.html

@@ -8,7 +8,7 @@
   <span class="operation-wrapper">
     <a href="{{ op.remove_disk.get_url }}?disk={{d.pk}}"
       class="btn btn-xs btn-{{ op.remove_disk.effect}} pull-right operation disk-remove-btn
-      {% if op.resize_disk.disabled %}disabled{% endif %}">
+      {% if op.remove_disk.disabled %}disabled{% endif %}">
       <i class="fa fa-{{ op.remove_disk.icon }}"></i> {% trans "Remove" %}
     </a>
   </span>