[gxml] XListChildren: removed dependency on Namespace deprecated interface

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 4e41876c30c1fa289e4321224bfd66f360e1f2ab
Author: Daniel Espinosa <esodan gmail com>
Date:   Fri Jul 5 13:54:10 2019 -0500

    XListChildren: removed dependency on Namespace deprecated interface

 gxml/XListChildren.vala | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)
---
diff --git a/gxml/XListChildren.vala b/gxml/XListChildren.vala
index 7b95018..ad211d8 100644
--- a/gxml/XListChildren.vala
+++ b/gxml/XListChildren.vala
@@ -106,10 +106,7 @@ public class GXml.XListChildren : AbstractBidirList<GXml.DomNode>,
   }
   public override bool add (GXml.DomNode item) {
     if (_node == null) return false;
-    if (!(item is XNamespace))
-      return (_node->add_child (((XNode) item).get_internal_node ())) != null;
-    var ns = (GXml.Namespace) item;
-    return (_node->new_ns (ns.uri, ns.prefix)) != null;
+    return (_node->add_child (((XNode) item).get_internal_node ())) != null;
   }
   public override void clear () {
     if (_node == null) return;