Remove dedicated TextCodecUTF16

Source/wtf/text/TextEncodingRegistry.cpp

Index: Source/wtf/text/TextEncodingRegistry.cpp
diff --git a/Source/wtf/text/TextEncodingRegistry.cpp b/Source/wtf/text/TextEncodingRegistry.cpp
index a2b805066bc0af9eaede7c3b248831ce125777ab..37f81e3435e37e2585009bc0c48233923709430a 100644
--- a/Source/wtf/text/TextEncodingRegistry.cpp
+++ b/Source/wtf/text/TextEncodingRegistry.cpp
@@ -39,7 +39,6 @@
 #include "wtf/text/TextCodecICU.h"
 #include "wtf/text/TextCodecLatin1.h"
 #include "wtf/text/TextCodecReplacement.h"
-#include "wtf/text/TextCodecUTF16.h"
 #include "wtf/text/TextCodecUTF8.h"
 #include "wtf/text/TextCodecUserDefined.h"
 #include "wtf/text/TextEncoding.h"
@@ -225,9 +224,6 @@ static void buildBaseTextCodecMaps()
     TextCodecUTF8::registerEncodingNames(addToTextEncodingNameMap);
     TextCodecUTF8::registerCodecs(addToTextCodecMap);
 
-    TextCodecUTF16::registerEncodingNames(addToTextEncodingNameMap);
-    TextCodecUTF16::registerCodecs(addToTextCodecMap);
-
     TextCodecUserDefined::registerEncodingNames(addToTextEncodingNameMap);
     TextCodecUserDefined::registerCodecs(addToTextCodecMap);
 }