U4-8199 - Remove the obsolete EncodedStringWriter.cs

No references, clean build - looks safe to remove

http://issues.umbraco.org/issue/U4-8199

src/Umbraco.Web/Umbraco.Web.csproj

@@ -1704,7 +1704,6 @@
     </Compile>
     <Compile Include="WebServices\XmlDataIntegrityController.cs" />
     <Compile Include="WebViewPageExtensions.cs" />
-    <Compile Include="_Legacy\Utils\EncodedStringWriter.cs" />
     <Compile Include="_Legacy\Utils\JSONSerializer.cs" />
     <None Include="..\Umbraco.Web.UI\Views\web.config">
       <Link>Mvc\web.config</Link>

src/Umbraco.Web/_Legacy/Utils/EncodedStringWriter.cs

@@ -1,42 +0,0 @@
-using System;
-using System.IO;
-using System.Text;
-
-namespace Umbraco.Web._Legacy.Utils
-{
-
-    /// <summary>
-    /// A TextWriter class based on the StringWriter that can support any encoding, not just UTF-16
-    /// as is the default of the normal StringWriter class
-    /// </summary>
-    [Obsolete("Remove this for v8")]
-    internal class EncodedStringWriter : StringWriter
-    {
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="EncodedStringWriter"/> class.
-        /// </summary>
-        /// <param name="sb">The sb.</param>
-        /// <param name="enc">The enc.</param>
-        public EncodedStringWriter(StringBuilder sb, Encoding enc)
-            : base(sb)
-        {
-            m_encoding = enc;
-        }
-
-        private Encoding m_encoding;
-
-        /// <summary>
-        /// Gets the <see cref="T:System.Text.Encoding"></see> in which the output is written.
-        /// </summary>
-        /// <value></value>
-        /// <returns>The Encoding in which the output is written.</returns>
-        public override Encoding Encoding
-        {
-            get
-            {
-                return m_encoding;
-            }
-        }
-    }
-}