Revert "Move `analyzer_cli` into the SDK."

pkg/analyzer_cli/test/data/linter_project/test_file.dart

Index: pkg/analyzer_cli/test/data/linter_project/test_file.dart
diff --git a/pkg/analyzer_cli/test/data/linter_project/test_file.dart b/pkg/analyzer_cli/test/data/linter_project/test_file.dart
deleted file mode 100644
index c1726a864172154174f7f1d5e9e2812c6663ab5e..0000000000000000000000000000000000000000
--- a/pkg/analyzer_cli/test/data/linter_project/test_file.dart
+++ /dev/null
@@ -1,7 +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.
-
-library analyzer_cli.test.data.linter_project.test_file;
-
-class a {}