Fix knotes not appearing on the desktop when a session is restored.

Thanks to Slavek Banko.
This resolves bug report 987.
(cherry picked from commit 533f494f46)

knotes/knote.cpp

@@ -765,7 +765,7 @@ void KNote::slotClose()
     m_editor->clearFocus();
     m_config->setHideNote( true );
     m_config->setPosition( pos() );
-    m_config->writeConfig();
+
     // just hide the note so it's still available from the dock window
     hide();
 }