Remove remaining dead code that was used to implement grouped permission drop downs

chrome/browser/ui/views/permission_bubble/permission_prompt_impl.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.
 
 #include "chrome/browser/ui/views/permission_bubble/permission_prompt_impl.h"
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ skipping 309 matching lines @@
   return nullptr;
 }
 
 void PermissionPromptImpl::Closing() {
   if (bubble_delegate_)
     bubble_delegate_ = nullptr;
   if (delegate_)
     delegate_->Closing();
 }
 
-void PermissionPromptImpl::ToggleAccept(int index, bool value) {
-  if (delegate_)
-    delegate_->ToggleAccept(index, value);
-}
-
 void PermissionPromptImpl::TogglePersist(bool value) {
   if (delegate_)
     delegate_->TogglePersist(value);
 }
 
 void PermissionPromptImpl::Accept() {
   if (delegate_)
     delegate_->Accept();
 }
 
 void PermissionPromptImpl::Deny() {
   if (delegate_)
     delegate_->Deny();
 }