Switch "html" Mojo modules to the Sky module system

mojo/public/html/BUILD.gn

Index: mojo/public/html/BUILD.gn
diff --git a/mojo/public/html/BUILD.gn b/mojo/public/html/BUILD.gn
deleted file mode 100644
index a580437579b72481de82da707f359bc37d47eaf8..0000000000000000000000000000000000000000
--- a/mojo/public/html/BUILD.gn
+++ /dev/null
@@ -1,25 +0,0 @@
-# Copyright 2014 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.
-
-action_foreach("html") {
-  script = "convert_amd_modules_to_html.py"
-  sources = [
-    "//mojo/public/js/bindings/buffer.js",
-    "//mojo/public/js/bindings/codec.js",
-    "//mojo/public/js/bindings/connection.js",
-    "//mojo/public/js/bindings/connector.js",
-    "//mojo/public/js/bindings/router.js",
-    "//mojo/public/js/bindings/unicode.js",
-    "//mojo/public/js/bindings/validator.js",
-  ]
-  outputs = [
-    "$target_gen_dir/{{source_name_part}}.html",
-  ]
-  args = [
-    "--input",
-    "{{source}}",
-    "--output",
-    rebase_path(target_gen_dir, root_build_dir) + "/{{source_name_part}}.html"
-  ]
-}