Move ranker_model_loader to a new component.

components/translate/core/browser/proto/BUILD.gn

Index: components/translate/core/browser/proto/BUILD.gn
diff --git a/components/translate/core/browser/proto/BUILD.gn b/components/translate/core/browser/proto/BUILD.gn
deleted file mode 100644
index e7424bd588b10e44d742a9539c56923884047919..0000000000000000000000000000000000000000
--- a/components/translate/core/browser/proto/BUILD.gn
+++ /dev/null
@@ -1,12 +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.
-
-import("//third_party/protobuf/proto_library.gni")
-
-proto_library("proto") {
-  sources = [
-    "ranker_model.proto",
-    "translate_ranker_model.proto",
-  ]
-}