Move all main methods to tool/.

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

Index: pkg/front_end/lib/src/fasta/bin/outline.dart
diff --git a/pkg/front_end/lib/src/fasta/bin/outline.dart b/pkg/front_end/lib/src/fasta/bin/outline.dart
deleted file mode 100644
index 00b847dbda245ebc0892b939ff5c84ffd057c1b8..0000000000000000000000000000000000000000
--- a/pkg/front_end/lib/src/fasta/bin/outline.dart
+++ /dev/null
@@ -1,16 +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 file.
-
-import '../outline.dart' as outline;
-
-const int iterations = const int.fromEnvironment("iterations", defaultValue: 1);
-
-main(List<String> arguments) async {
-  for (int i = 0; i < iterations; i++) {
-    if (i > 0) {
-      print("\n");
-    }
-    await outline.outline(arguments);
-  }
-}