[subresource_filter] Remove dead OnManageLinkClicked code path

chrome/browser/ui/content_settings/content_setting_bubble_model.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_UI_CONTENT_SETTINGS_CONTENT_SETTING_BUBBLE_MODEL_H_
 #define CHROME_BROWSER_UI_CONTENT_SETTINGS_CONTENT_SETTING_BUBBLE_MODEL_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 312 matching lines @@
                                              Profile* profile);
 
   ~ContentSettingSubresourceFilterBubbleModel() override;
 
  private:
   void SetMessage();
 
   // ContentSettingBubbleModel:
   void SetTitle() override;
   void SetManageText() override;
-  void OnManageLinkClicked() override;
   void OnManageCheckboxChecked(bool is_checked) override;
   ContentSettingSubresourceFilterBubbleModel* AsSubresourceFilterBubbleModel()
       override;
   void OnDoneClicked() override;
 
   bool is_checked_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(ContentSettingSubresourceFilterBubbleModel);
 };
 
@@ skipping 72 matching lines @@
   void SetTitle() override;
   void SetManageText() override;
   void OnManageLinkClicked() override;
 
   int selected_item_ = 0;
 
   DISALLOW_COPY_AND_ASSIGN(ContentSettingDownloadsBubbleModel);
 };
 
 #endif  // CHROME_BROWSER_UI_CONTENT_SETTINGS_CONTENT_SETTING_BUBBLE_MODEL_H_