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

chrome/browser/permissions/permission_request_manager.cc

Index: chrome/browser/permissions/permission_request_manager.cc
diff --git a/chrome/browser/permissions/permission_request_manager.cc b/chrome/browser/permissions/permission_request_manager.cc
index 3d4e4d2f7ab86ef3f1b5958cdf47ec6ca27b9be1..494b8804e62fc2f00771613833df54b4c931a36d 100644
--- a/chrome/browser/permissions/permission_request_manager.cc
+++ b/chrome/browser/permissions/permission_request_manager.cc
@@ -334,16 +334,6 @@ const std::vector<PermissionRequest*>& PermissionRequestManager::Requests() {
   return requests_;
 }
 
-const std::vector<bool>& PermissionRequestManager::AcceptStates() {
-  // TODO(crbug.com/728483): Remove this function.
-  CR_DEFINE_STATIC_LOCAL(std::vector<bool>, accept_states, ());
-  return accept_states;
-}
-
-void PermissionRequestManager::ToggleAccept(int request_index, bool new_value) {
-  // TODO(crbug.com/728483): Remove this function.
-}
-
 void PermissionRequestManager::TogglePersist(bool new_value) {
   persist_ = new_value;
 }