Revert "[Translate] Add translate ranker model loader."

ios/chrome/browser/translate/translate_ranker_metrics_provider.cc

-// Copyright 2017 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.
-
-#include "ios/chrome/browser/translate/translate_ranker_metrics_provider.h"
-
-#include "components/metrics/proto/chrome_user_metrics_extension.pb.h"
-#include "components/metrics/proto/translate_event.pb.h"
-#include "components/translate/core/browser/translate_ranker.h"
-#include "ios/chrome/browser/application_context.h"
-#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
-#include "ios/chrome/browser/browser_state/chrome_browser_state_manager.h"
-#include "ios/chrome/browser/translate/translate_ranker_factory.h"
-#include "ios/web/public/browser_state.h"
-
-namespace translate {
-
-void TranslateRankerMetricsProvider::ProvideGeneralMetrics(
-    metrics::ChromeUserMetricsExtension* uma_proto) {
-  std::vector<ios::ChromeBrowserState*> browser_states =
-      GetApplicationContext()
-          ->GetChromeBrowserStateManager()
-          ->GetLoadedBrowserStates();
-  for (auto* state : browser_states) {
-    TranslateRanker* ranker =
-        TranslateRankerFactory::GetInstance()->GetForBrowserState(state);
-    DCHECK(ranker);
-    std::vector<metrics::TranslateEventProto> translate_events;
-    ranker->FlushTranslateEvents(&translate_events);
-
-    for (auto& event : translate_events) {
-      uma_proto->add_translate_event()->Swap(&event);
-    }
-  }
-}
-
-}  // namespace translate