Move mojom to public/dart

mojo/dart/mojom/BUILD.gn

Index: mojo/dart/mojom/BUILD.gn
diff --git a/mojo/dart/mojom/BUILD.gn b/mojo/dart/mojom/BUILD.gn
deleted file mode 100644
index 70ff7da59f4f15e72fac828c114da29c9804e509..0000000000000000000000000000000000000000
--- a/mojo/dart/mojom/BUILD.gn
+++ /dev/null
@@ -1,19 +0,0 @@
-# Copyright 2015 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-import("//mojo/public/dart/rules.gni")
-
-dart_pkg("mojom") {
-  libs = [ "lib/generate.dart" ]
-  sources = [
-    "CHANGELOG.md",
-    "README.md",
-    "lib/src/options.dart",
-    "lib/src/utils.dart",
-    "pubspec.yaml",
-  ]
-  deps = [
-    "//third_party/dart-pkg",
-  ]
-}