Cleaning up dead code in System.Net.Mail

Reverting back file to avoid tabs instead of spaces.

Author: Ermiar

src/System.Net.Mail/src/System/Net/Mime/EncodedStreamFactory.cs

@@ -18,31 +18,31 @@ internal class EncodedStreamFactory
         //default buffer size for encoder
         private const int InitialBufferSize = 1024;
 
-		//get a raw encoder, not for use with header encoding
-		internal IEncodableStream GetEncoder(TransferEncoding encoding, Stream stream)
-		{
-			//raw encoder
-			if (encoding == TransferEncoding.Base64)
-			{
-				return new Base64Stream(stream, new Base64WriteStateInfo());
-			}
+        //get a raw encoder, not for use with header encoding
+        internal IEncodableStream GetEncoder(TransferEncoding encoding, Stream stream)
+        {
+            //raw encoder
+            if (encoding == TransferEncoding.Base64)
+            {
+                return new Base64Stream(stream, new Base64WriteStateInfo());
+            }
 
-			//return a QuotedPrintable stream because this is not being used for header encoding
-			if (encoding == TransferEncoding.QuotedPrintable)
-			{
-				return new QuotedPrintableStream(stream, true);
-			}
+            //return a QuotedPrintable stream because this is not being used for header encoding
+            if (encoding == TransferEncoding.QuotedPrintable)
+            {
+                return new QuotedPrintableStream(stream, true);
+            }
 
-			if (encoding == TransferEncoding.SevenBit || encoding == TransferEncoding.EightBit)
-			{
-				return new EightBitStream(stream);
-			}
+            if (encoding == TransferEncoding.SevenBit || encoding == TransferEncoding.EightBit)
+            {
+                return new EightBitStream(stream);
+            }
 
-			throw new NotSupportedException();
-		}
+            throw new NotSupportedException();
+        }
 
-		//use for encoding headers
-		internal IEncodableStream GetEncoderForHeader(Encoding encoding, bool useBase64Encoding, int headerTextLength)
+        //use for encoding headers
+        internal IEncodableStream GetEncoderForHeader(Encoding encoding, bool useBase64Encoding, int headerTextLength)
         {
             byte[] header = CreateHeader(encoding, useBase64Encoding);
             byte[] footer = CreateFooter();