Removing a bunch of unused platform code.

Source/WTF/wtf/text/WTFString.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007-2009 Torch Mobile, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 394 matching lines @@
     if (!m_impl)
         return 0;
     if (m_impl->hasTerminatingNullCharacter())
         return m_impl->characters();
     m_impl = StringImpl::createWithTerminatingNullCharacter(*m_impl);
     return m_impl->characters();
 }
 
 String String::format(const char *format, ...)
 {
-#if PLATFORM(QT)
-    // Use QString::vsprintf to avoid the locale dependent formatting of vsnprintf.
-    // https://bugs.webkit.org/show_bug.cgi?id=18994
+#if OS(WINCE)
     va_list args;
     va_start(args, format);
 
-    QString buffer;
-    buffer.vsprintf(format, args);
-
-    va_end(args);
-
-    QByteArray ba = buffer.toUtf8();
-    return StringImpl::create(reinterpret_cast<const LChar*>(ba.constData()), ba.length());
-
-#elif OS(WINCE)
-    va_list args;
-    va_start(args, format);
-
     Vector<char, 256> buffer;
 
     int bufferSize = 256;
     buffer.resize(bufferSize);
     for (;;) {
         int written = vsnprintf(buffer.data(), bufferSize, format, args);
         va_end(args);
 
         if (written == 0)
             return String("");
@@ skipping 820 matching lines @@
     buffer.append('\0');
     return buffer;
 }
 
 Vector<char> asciiDebug(String& string)
 {
     return asciiDebug(string.impl());
 }
 
 #endif