Remove dart:platform library.

sdk/lib/platform/platform.dart

Index: sdk/lib/platform/platform.dart
diff --git a/sdk/lib/platform/platform.dart b/sdk/lib/platform/platform.dart
deleted file mode 100644
index ee8658eba140d38e776204c8d78db1338a50ed05..0000000000000000000000000000000000000000
--- a/sdk/lib/platform/platform.dart
+++ /dev/null
@@ -1,116 +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.
-
-/**
- * Runtime information about the current platform.
- */
-library dart.platform;
-
-/**
- * The number of processors of the platform.
- *
- * Returns null if no information is available.
- *
- * Supported on the standalone Dart executable.
- */
-external int get numberOfProcessors;
-
-/**
- * The path separator used on the platform to separate
- * components in file paths.
- *
- * Returns null if the path separator is unknown or not valid.
- *
- * Supported on the standalone Dart executable and on dart2js.
- */
-external String get pathSeparator;
-
-/**
- * A string (`linux`, `macos`, `windows` or `android`)
- * representing the operating system.
- *
- * Returns null if the operating system could not be determined.
- */
-external String get operatingSystem;
-
-/**
- * The local hostname for the system.
- *
- * Returns null if the local hostname is not available.
- *
- * Supported on the standalone Dart executable.
- */
-external String get localHostname;
-
-/**
- * The version of the current Dart runtime.
- *
- * Returns null if not running a Dart runtime.
- *
- * Supported on the standalone Dart executable.
- */
-external String get version;
-
-/**
- * The environment for this instance of the platform.
- *
- * If environment variables are not supported on this platform, or not
- * available, null is returned.
- *
- * Environment variables on Windows are case-insensitive. The map
- * returned on Windows is therefore case-insensitive and converts
- * all keys and key arguments to its methods to upper case.
- * On other platforms the returned map is
- * a standard case-sensitive map.
- *
- * Supported on the standalone Dart executable.
- */
-external Map<String, String> get environment;
-
-/**
- * The path of the executable this Dart isolate is running on.
- *
- * Returns null if the execution environment does not make the information
- * available.
- *
- * Supported on the standalone Dart executable.
- */
-external String get executable;
-
-/**
- * The URI of the script being run in this isolate.
- *
- * If the URI is relative it is relative to the file URI of
- * the working directory of the VM when it was started.
- *
- * Returns null if the executable environment does not make the information
- * available.
- *
- * Supported on the standalone Dart executable.
- */
-external Uri get script;
-
-/**
- * The flags passed to the executable used to run the script in this
- * isolate. These are the command-line flags between the executable name
- * and the script name.
- *
- * Returns the empty list if [executableArguments] is not supported.
- *
- * Supported on the standalone Dart executable.
- */
-external List<String> get executableArguments;
-
-/**
- * The value of the --package-root flag passed to the executable
- * used to run the script in this isolate.  This is the directory in which
- * Dart packages are looked up.
- *
- * If there is no --package-root flag, then the empty string is returned.
- *
- * Returns null if the information is not available on this platform.
- *
- * Supported on the standalone Dart executable.
- */
-external String get packageRoot;