Remove Fasta's copy of accessors.dart.

pkg/front_end/test/fasta/testing.json

 {
 "":"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.",
 
   "packages": "../../../../.packages",
 
   "suites": [
 
     {
@@ skipping 143 matching lines @@
       "sdk_test.dart",
       "../../../analyzer/lib/src/fasta",
       "../../../compiler/bin",
       "../../../compiler/tool",
       "../../../../utils/kernel-service/kernel-service.dart",
       "../../../../tools/patch_sdk.dart"
     ],
 
     "exclude": [
       "/third_party/pkg/",
-      "/pkg/analyzer/(?!.*/fasta/)",
+      "/third_party/pkg_tested/",
+      "/pkg/analyzer/(?!.*/(fasta|kernel)/)",
       "/pkg/compiler/lib/(?!.*/(scanner|parser)/)",
       "/pkg/compiler/lib/src/parser/partial_elements\\.dart$",
       "/pkg/js_ast/",
       "/pkg/compiler/tool/dart2js_profile_many\\.dart$",
       "/pkg/compiler/tool/track_memory\\.dart$"
     ]
   }
 }