Revert of Convert network hints to Mojo

components/network_hints/public/cpp/BUILD.gn

Index: components/network_hints/public/cpp/BUILD.gn
diff --git a/components/network_hints/public/cpp/BUILD.gn b/components/network_hints/public/cpp/BUILD.gn
deleted file mode 100644
index 3d890c7833b7a20f60029a9cc804cf86a8f3fe15..0000000000000000000000000000000000000000
--- a/components/network_hints/public/cpp/BUILD.gn
+++ /dev/null
@@ -1,18 +0,0 @@
-# Copyright 2016 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.
-
-# GYP version: components/network_hints.gypi:public_cpp
-source_set("cpp") {
-  sources = [
-    "network_hints_param_traits.cc",
-    "network_hints_param_traits.h",
-  ]
-
-  deps = [
-    "//base",
-    "//components/network_hints/common",
-    "//ipc",
-    "//url/ipc:url_ipc",
-  ]
-}