Revert "Move `analyzer_cli` into the SDK."

pkg/analyzer_cli/test/sdk_ext_test.dart

Index: pkg/analyzer_cli/test/sdk_ext_test.dart
diff --git a/pkg/analyzer_cli/test/sdk_ext_test.dart b/pkg/analyzer_cli/test/sdk_ext_test.dart
deleted file mode 100644
index 1e716ffb72a492f019f86b1dbb09411c414d25c7..0000000000000000000000000000000000000000
--- a/pkg/analyzer_cli/test/sdk_ext_test.dart
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright (c) 2015, 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.
-
-@TestOn("vm")
-
-/// Test that sdk extensions are properly detected in various scenarios.
-library analyzer_cli.test.sdk_ext;
-
-import 'dart:io';
-
-import 'package:analyzer_cli/src/driver.dart' show Driver, errorSink, outSink;
-import 'package:path/path.dart' as path;
-import 'package:test/test.dart';
-
-import 'utils.dart';
-
-main() {
-  group('Sdk extensions', () {
-    StringSink savedOutSink, savedErrorSink;
-    int savedExitCode;
-    Directory savedCurrentDirectory;
-    setUp(() {
-      savedOutSink = outSink;
-      savedErrorSink = errorSink;
-      savedExitCode = exitCode;
-      outSink = new StringBuffer();
-      errorSink = new StringBuffer();
-      savedCurrentDirectory = Directory.current;
-    });
-    tearDown(() {
-      outSink = savedOutSink;
-      errorSink = savedErrorSink;
-      exitCode = savedExitCode;
-      Directory.current = savedCurrentDirectory;
-    });
-
-    test('--packages option supplied', () async {
-      var testDir = path.join(testDirectory, 'data', 'no_packages_file');
-      Directory.current = new Directory(testDir);
-      var packagesPath = path.join('..', 'packages_file', '.packages');
-      new Driver().start(['--packages', packagesPath, 'sdk_ext_user.dart']);
-
-      expect(exitCode, 0);
-    });
-
-    test('.packages file present', () async {
-      var testDir = path.join(testDirectory, 'data', 'packages_file');
-      Directory.current = new Directory(testDir);
-      new Driver().start(['sdk_ext_user.dart']);
-
-      expect(exitCode, 0);
-    });
-  });
-}