diff --git a/apps/dav/lib/CalDAV/Publishing/Xml/Publisher.php b/apps/dav/lib/CalDAV/Publishing/Xml/Publisher.php
index 6a0d8b2ec0c..4926d3abf9e 100644
--- a/apps/dav/lib/CalDAV/Publishing/Xml/Publisher.php
+++ b/apps/dav/lib/CalDAV/Publishing/Xml/Publisher.php
@@ -54,8 +54,6 @@ class Publisher implements XmlSerializable {
  	 * @return void
  	 */
    function xmlSerialize(Writer $writer) {
-
-     $cs = '{' . Plugin::NS_CALENDARSERVER . '}';
      if (!$this->isPublished) {
        $writer->write($this->publishUrl); // for pre-publish-url
      } else {