Remove deprecated 'raw' and 'raws' encoding

nodejs/node#2859

Author: feross

index.js

@@ -353,7 +353,6 @@ Buffer.isEncoding = function isEncoding (encoding) {
     case 'ascii':
     case 'binary':
     case 'base64':
-    case 'raw':
     case 'ucs2':
     case 'ucs-2':
     case 'utf16le':
@@ -415,8 +414,6 @@ function byteLength (string, encoding) {
     switch (encoding) {
       case 'ascii':
       case 'binary':
-      case 'raw':
-      case 'raws':
         return len
       case 'utf8':
       case 'utf-8':