Move kernel baseline tests to front_end.

pkg/front_end/test/fasta/rasta/issue_000006.dart

Index: pkg/front_end/test/fasta/rasta/issue_000006.dart
diff --git a/pkg/front_end/test/fasta/rasta/issue_000006.dart b/pkg/front_end/test/fasta/rasta/issue_000006.dart
deleted file mode 100644
index 8883ac2982d71a0669d138ff126388bad6332563..0000000000000000000000000000000000000000
--- a/pkg/front_end/test/fasta/rasta/issue_000006.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.
-
-var list = [1, 2, 3];
-
-main() {
-  list.add(1);
-}