[dart:io] Remove DART_IO_DISABLED

runtime/bin/filter_unsupported.cc

Index: runtime/bin/filter_unsupported.cc
diff --git a/runtime/bin/filter_unsupported.cc b/runtime/bin/filter_unsupported.cc
deleted file mode 100644
index d33a9530a03e2f6dc9a7ad307ad48c97dd060e37..0000000000000000000000000000000000000000
--- a/runtime/bin/filter_unsupported.cc
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright (c) 2013, 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.
-
-#if defined(DART_IO_DISABLED)
-
-#include "bin/builtin.h"
-#include "bin/dartutils.h"
-#include "include/dart_api.h"
-
-namespace dart {
-namespace bin {
-
-void FUNCTION_NAME(Filter_CreateZLibInflate)(Dart_NativeArguments args) {
-  Dart_ThrowException(DartUtils::NewInternalError(
-      "ZLibInflater and Deflater not supported on this platform"));
-}
-
-void FUNCTION_NAME(Filter_CreateZLibDeflate)(Dart_NativeArguments args) {
-  Dart_ThrowException(DartUtils::NewInternalError(
-      "ZLibInflater and Deflater not supported on this platform"));
-}
-
-void FUNCTION_NAME(Filter_Process)(Dart_NativeArguments args) {
-  Dart_ThrowException(DartUtils::NewInternalError(
-      "ZLibInflater and Deflater not supported on this platform"));
-}
-
-void FUNCTION_NAME(Filter_Processed)(Dart_NativeArguments args) {
-  Dart_ThrowException(DartUtils::NewInternalError(
-      "ZLibInflater and Deflater not supported on this platform"));
-}
-
-}  // namespace bin
-}  // namespace dart
-
-#endif  // defined(DART_IO_DISABLED)