Move all main methods to tool/.

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

Index: pkg/front_end/lib/src/fasta/bin/generate_dart_libraries.dart
diff --git a/pkg/front_end/lib/src/fasta/bin/generate_dart_libraries.dart b/pkg/front_end/lib/src/fasta/bin/generate_dart_libraries.dart
deleted file mode 100644
index 24ad73f1fede022e7f3aaeefff0627e030ed4c04..0000000000000000000000000000000000000000
--- a/pkg/front_end/lib/src/fasta/bin/generate_dart_libraries.dart
+++ /dev/null
@@ -1,14 +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.
-
-import 'package:sdk_library_metadata/libraries.dart'
-    show LibraryInfo, libraries;
-
-void main(_) {
-  libraries.forEach((String name, LibraryInfo info) {
-    if (info.isVmLibrary) {
-      print('"$name": sdk.resolve("lib/${info.path}"),');
-    }
-  });
-}