Revert "Make File.create() fail when a directory exists at the same path"

tests/standalone/io/file_create_test.dart

Index: tests/standalone/io/file_create_test.dart
diff --git a/tests/standalone/io/file_create_test.dart b/tests/standalone/io/file_create_test.dart
deleted file mode 100644
index ebb94281f47c8344920a5b546b5e2778868f9919..0000000000000000000000000000000000000000
--- a/tests/standalone/io/file_create_test.dart
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright (c) 2016, 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.
-//
-// Dart test program for testing file creation.
-
-import 'dart:async';
-import 'dart:io';
-
-import "package:expect/expect.dart";
-import "package:path/path.dart";
-
-testCreate() async {
-  Directory tmp = await Directory.systemTemp.createTemp('file_test_create');
-  Expect.isTrue(await tmp.exists());
-  String filePath = "${tmp.path}/foo";
-  File file = new File(filePath);
-  File createdFile = await file.create();
-  Expect.equals(file, createdFile);
-  Expect.isTrue(await createdFile.exists());
-  await tmp.delete(recursive: true);
-}
-
-testBadCreate() async {
-  Directory tmp = await Directory.systemTemp.createTemp('file_test_create');
-  Expect.isTrue(await tmp.exists());
-  Directory tmp2 = await tmp.createTemp('file_test_create');
-  Expect.isTrue(await tmp2.exists());
-  String badFilePath = tmp2.path;
-  File badFile = new File(badFilePath);
-  try {
-    await badFile.create();
-    Expect.fail('Should be unreachable');
-  } catch(e) {
-    Expect.isTrue(e is FileSystemException);
-    if (Platform.isWindows) {
-      Expect.isTrue(e.toString().contains('Access is denied'));
-    } else {
-      Expect.isTrue(e.toString().contains('Is a directory'));
-    }
-  }
-  await tmp.delete(recursive: true);
-}
-
-main() async {
-  await testCreate();
-  await testBadCreate();
-}