Move kernel baseline tests to front_end.

pkg/front_end/test/fasta/rasta/import_export.dart

Index: pkg/front_end/test/fasta/rasta/import_export.dart
diff --git a/pkg/front_end/test/fasta/rasta/import_export.dart b/pkg/front_end/test/fasta/rasta/import_export.dart
deleted file mode 100644
index 8d6f2c4bbeb5131aedb3d224cec655bb555c31db..0000000000000000000000000000000000000000
--- a/pkg/front_end/test/fasta/rasta/import_export.dart
+++ /dev/null
@@ -1,9 +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.md file.
-
-import 'export.dart';
-
-main() {
-  foo();
-}