Remove old clear browsing data methods on iOS

ios/chrome/browser/browsing_data/browsing_data_remover_helper.cc

 // 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.
 
 #include "ios/chrome/browser/browsing_data/browsing_data_remover_helper.h"
 
 #include <utility>
 
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 
@@ skipping 40 matching lines @@
       pending_removals_iter->second->remove_mask |= remove_mask;
       pending_removals_iter->second->callbacks.push_back(callback);
     }
   } else {
     std::unique_ptr<BrowsingDataRemovalInfo> removal_info(
         new BrowsingDataRemovalInfo(remove_mask, time_period, callback));
     DoRemove(browser_state, std::move(removal_info));
   }
 }
 
-void BrowsingDataRemoverHelper::Remove(ios::ChromeBrowserState* browser_state,
-                                       int remove_mask,
-                                       const base::Closure& callback) {
-  Remove(browser_state, remove_mask, browsing_data::ALL_TIME, callback);
-}
-
 void BrowsingDataRemoverHelper::OnIOSChromeBrowsingDataRemoverDone() {
   current_remover_ = nullptr;
 
   DCHECK(current_removal_info_);
   // Inform clients of the currently finished removal operation that browsing
   // data was removed.
   for (const auto& callback : current_removal_info_->callbacks) {
     if (!callback.is_null()) {
       callback.Run();
     }
@@ skipping 20 matching lines @@
 
   // IOSChromeBrowsingDataRemover deletes itself.
   IOSChromeBrowsingDataRemover* remover =
       IOSChromeBrowsingDataRemover::CreateForPeriod(
           browser_state, current_removal_info_->time_period);
   remover->AddObserver(this);
   current_remover_ = remover;
   int remove_mask = current_removal_info_->remove_mask;
   remover->Remove(remove_mask);
 }