Revert of Add Mojo interfaces for out-of-process proxy resolver.

net/interfaces/BUILD.gn

Index: net/interfaces/BUILD.gn
diff --git a/net/interfaces/BUILD.gn b/net/interfaces/BUILD.gn
deleted file mode 100644
index 03a07785251e4d2fa222319e0a4cab1d0c4c5f9a..0000000000000000000000000000000000000000
--- a/net/interfaces/BUILD.gn
+++ /dev/null
@@ -1,12 +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("//third_party/mojo/src/mojo/public/tools/bindings/mojom.gni")
-
-mojom("interfaces") {
-  sources = [
-    "host_resolver_service.mojom",
-    "proxy_resolver_service.mojom",
-  ]
-}