Move kernel baseline tests to front_end.

pkg/front_end/test/fasta/rasta/issue_000048.dart

Index: pkg/front_end/test/fasta/rasta/issue_000048.dart
diff --git a/pkg/front_end/test/fasta/rasta/issue_000048.dart b/pkg/front_end/test/fasta/rasta/issue_000048.dart
deleted file mode 100644
index 02114800170b4bf35a004e33cccc0856c4762dc0..0000000000000000000000000000000000000000
--- a/pkg/front_end/test/fasta/rasta/issue_000048.dart
+++ /dev/null
@@ -1,19 +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.
-
-class A {
-  bool v1;
-  num v2;
-  A(bool this.v1, num this.v2);
-}
-
-class M1 {
-  num v2 = 0;
-}
-
-class C = A with M1;
-
-main() {
-  C c = new C(true, 2);
-}