Remove unused feedback class in dom distiller component

components/dom_distiller/content/browser/distiller_javascript_service_impl.h

 // Copyright 2015 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 COMPONENTS_DOM_DISTILLER_CONTENT_BROWSER_DISTILLER_JAVASCRIPT_SERVICE_IMPL_H_
 #define COMPONENTS_DOM_DISTILLER_CONTENT_BROWSER_DISTILLER_JAVASCRIPT_SERVICE_IMPL_H_
 
 #include "base/macros.h"
 #include "components/dom_distiller/content/browser/distiller_ui_handle.h"
 #include "components/dom_distiller/content/common/distiller_javascript_service.mojom.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace dom_distiller {
 
 // This is the receiving end of "distiller" JavaScript object calls.
 class DistillerJavaScriptServiceImpl
     : public mojom::DistillerJavaScriptService {
  public:
   DistillerJavaScriptServiceImpl(content::RenderFrameHost* render_frame_host,
                                  DistillerUIHandle* distiller_ui_handle);
   ~DistillerJavaScriptServiceImpl() override;
 
   // Mojo mojom::DistillerJavaScriptService implementation.
 
-  // Send UMA feedback and start the external feedback reporter if one exists.
-  void HandleDistillerFeedbackCall(bool good) override;
-
   // Make a call into Android to close the overlay panel containing reader mode.
   void HandleDistillerClosePanelCall(bool animate) override;
 
   // Show the Android view containing Reader Mode settings.
   void HandleDistillerOpenSettingsCall() override;
 
  private:
   content::RenderFrameHost* render_frame_host_;
   DistillerUIHandle* distiller_ui_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(DistillerJavaScriptServiceImpl);
 };
 
 // static
 void CreateDistillerJavaScriptService(
     content::RenderFrameHost* render_frame_host,
     DistillerUIHandle* distiller_ui_handle,
     mojo::InterfaceRequest<mojom::DistillerJavaScriptService> request);
 
 }  // namespace dom_distiller
 
 #endif  // COMPONENTS_DOM_DISTILLER_CONTENT_BROWSER_DISTILLER_JAVASCRIPT_SERVICE_IMPL_H_