Remove package imports from itself.

pkg/front_end/lib/src/fasta/parser/bin/parser.dart

Index: pkg/front_end/lib/src/fasta/parser/bin/parser.dart
diff --git a/pkg/front_end/lib/src/fasta/parser/bin/parser.dart b/pkg/front_end/lib/src/fasta/parser/bin/parser.dart
index a20586ade1d6f9fc0478a0cee110b32bf2f86782..f6ae03d671d0d6b58040ced34ebd8ad7e16c057d 100644
--- a/pkg/front_end/lib/src/fasta/parser/bin/parser.dart
+++ b/pkg/front_end/lib/src/fasta/parser/bin/parser.dart
@@ -2,6 +2,6 @@
 // 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.
 
-import 'package:front_end/src/fasta/parser/main.dart' as dart_parser;
+import '../main.dart' as dart_parser;
 
 main(List<String> arguments) => dart_parser.main(arguments);