[dart:io] Remove DART_IO_DISABLED

runtime/bin/platform_win.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "platform/globals.h"
 #if defined(HOST_OS_WINDOWS)
 
 #include "bin/platform.h"
 
 #include <crtdbg.h>
 
 #include "bin/file.h"
 #include "bin/lockers.h"
 #include "bin/log.h"
-#if !defined(DART_IO_DISABLED) && !defined(PLATFORM_DISABLE_SOCKET)
+#if !defined(PLATFORM_DISABLE_SOCKET)
 #include "bin/socket.h"
 #endif
 #include "bin/thread.h"
 #include "bin/utils.h"
 #include "bin/utils_win.h"
 
 // These are not always defined in the header files. See:
 // https://msdn.microsoft.com/en-us/library/windows/desktop/ms686033(v=vs.85).aspx
 #ifndef ENABLE_VIRTUAL_TERMINAL_INPUT
 #define ENABLE_VIRTUAL_TERMINAL_INPUT 0x0200
@@ skipping 198 matching lines @@
 const char* Platform::LocaleName() {
   wchar_t locale_name[LOCALE_NAME_MAX_LENGTH];
   int result = GetUserDefaultLocaleName(locale_name, LOCALE_NAME_MAX_LENGTH);
   if (result == 0) {
     return NULL;
   }
   return StringUtilsWin::WideToUtf8(locale_name);
 }
 
 bool Platform::LocalHostname(char* buffer, intptr_t buffer_length) {
-#if defined(DART_IO_DISABLED) || defined(PLATFORM_DISABLE_SOCKET)
+#if defined(PLATFORM_DISABLE_SOCKET)
   return false;
 #else
   if (!SocketBase::Initialize()) {
     return false;
   }
   return gethostname(buffer, buffer_length) == 0;
 #endif
 }
 
 char** Platform::Environment(intptr_t* count) {
@@ skipping 59 matching lines @@
   PlatformWin::RestoreConsole();
   // On Windows we use ExitProcess so that threads can't clobber the exit_code.
   // See: https://code.google.com/p/nativeclient/issues/detail?id=2870
   ::ExitProcess(exit_code);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(HOST_OS_WINDOWS)