Delete the non-static CLD data source logic.

components/translate/content/renderer/renderer_cld_data_provider.cc

-// 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.
-
-// NOT DEAD CODE!
-// This code isn't dead, even if it isn't currently being used. Please refer to:
-// https://www.chromium.org/developers/how-tos/compact-language-detector-cld-data-source-configuration
-
-#include "components/translate/content/renderer/renderer_cld_data_provider.h"
-
-namespace translate {
-
-RendererCldDataProvider::RendererCldDataProvider() {
-  // Nothing
-}
-
-bool RendererCldDataProvider::IsCldDataAvailable() {
-  return true;
-}
-
-bool RendererCldDataProvider::OnMessageReceived(const IPC::Message& message) {
-  return false;  // Message not handled
-}
-
-void RendererCldDataProvider::SetCldAvailableCallback
-(base::Callback<void(void)> callback) {
-  callback.Run();
-}
-
-}  // namespace translate