XmlAttributeRemoval

using System.IO;
using System.Runtime.Serialization.Json;
using System.Text;
using System.Xml;
using System.Xml.Linq;

class Program
{
    public static void Main()
    {
        var jsonString = "{\"id\":\"108013515952807\",\"posts\":{\"data\":[{\"id\":\"108013515952807_470186843068804\",\"created_time\":\"2013-05-14T20:43:28+0000\"},{\"message\":\"TEKST\",\"id\":\"108013515952807_470178529736302\",\"created_time\":\"2013-05-14T20:22:07+0000\"}]}}";
        var xDoc = JsonToXml(jsonString);

        var doc = new XmlDocument();
        doc.Load(xDoc.Root.CreateReader());

        RemoveAttr(doc.DocumentElement);

        var result = doc.OuterXml;
    }

    private static void RemoveAttr(XmlNode root)
    {
        if (root is XmlElement)
        {
            root.Attributes.RemoveNamedItem("type");
            if (root.HasChildNodes) RemoveAttr(root.FirstChild);
            if (root.NextSibling != null) RemoveAttr(root.NextSibling);
        }
    }

    private static XDocument JsonToXml(string jsonString)
    {
        using (var stream = new MemoryStream(Encoding.ASCII.GetBytes(jsonString)))
        {
            var quotas = new XmlDictionaryReaderQuotas();
            return XDocument.Load(JsonReaderWriterFactory.CreateJsonReader(stream, quotas));
        }
    }
}