(legacy) remove redundant xmlparse.inc from ipsec.inc

src/etc/inc/ipsec.inc

@@ -27,7 +27,6 @@
 	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 	POSSIBILITY OF SUCH DAMAGE.
 */
-require_once("xmlparse.inc");
 
 /* IPsec defines */
 $ipsec_loglevels = array("dmn" => "Daemon", "mgr" => "SA Manager", "ike" => "IKE SA", "chd" => "IKE Child SA",