Revert "Add support for the new function-type syntax."

pkg/front_end/test/fasta/function_type_recovery_test.dart

Index: pkg/front_end/test/fasta/function_type_recovery_test.dart
diff --git a/pkg/front_end/test/fasta/function_type_recovery_test.dart b/pkg/front_end/test/fasta/function_type_recovery_test.dart
deleted file mode 100644
index a7483273807f780b7e1e134496933c5bb843f38c..0000000000000000000000000000000000000000
--- a/pkg/front_end/test/fasta/function_type_recovery_test.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright (c) 2017, 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 file.
-
-// Tests that an inline function type inside a `Function` type isn't a
-// parser error.
-
-typedef F = int Function(int f(String x));
-
-main() {
-  F f = null;
-  String Function(String g(int y)) g = null;
-}