porting 7.6-rc1 into 8

src/Umbraco.Core/XmlExtensions.cs

@@ -16,32 +16,6 @@ namespace Umbraco.Core
 	/// </summary>
 	internal static class XmlExtensions
 	{
-        /// <summary>
-        /// Saves the xml document async
-        /// </summary>
-        /// <param name="xdoc"></param>
-        /// <param name="filename"></param>
-        /// <returns></returns>
-	    public static async Task SaveAsync(this XmlDocument xdoc, string filename)
-	    {
-            if (xdoc.DocumentElement == null)
-                throw new XmlException("Cannot save xml document, there is no root element");
-
-            using (var fs = new FileStream(filename, FileMode.Create, FileAccess.Write, FileShare.Read, bufferSize: 4096, useAsync: true))
-            using (var xmlWriter = XmlWriter.Create(fs, new XmlWriterSettings
-            {
-                Async = true,
-                Encoding = Encoding.UTF8,
-                Indent = true
-            }))
-            {
-                //NOTE: There are no nice methods to write it async, only flushing it async. We
-                // could implement this ourselves but it'd be a very manual process.
-                xdoc.WriteTo(xmlWriter);
-                await xmlWriter.FlushAsync().ConfigureAwait(false);
-            }
-	    }
-
         public static bool HasAttribute(this XmlAttributeCollection attributes, string attributeName)
         {
             return attributes.Cast<XmlAttribute>().Any(x => x.Name == attributeName);