Implement RemoveExecutionPin

Hello !
I want to implement FGraphEditorCommands::Get().RemoveExecutionPin like in this file. I think I could do this using FGraphEditorModule.GetAllGraphEditorContextMenuExtender() and FGraphEditorMenuExtender_SelectedNode. So I successfully added my own Delegate to the MenuExtenders array at my module’s startup, but I can not remove it : I get a weird error (see below).
What am I doing wrong ? Am I missing another way to ‘override’ RemovExecutionPin ?

Simplified version of my code :

class FQuestEditor : public IQuestEditor
{
  FGraphEditorModule::FGraphEditorMenuExtender_SelectedNode EditorDelegate;
  virtual void StartupModule() override
  {
    //** bind delegate **//
    FGraphEditorModule& GraphEditorModule = FModuleManager::GetModuleChecked<FGraphEditorModule>( TEXT("GraphEditor") );
    GraphEditorModule.GetAllGraphEditorContextMenuExtender().Add(EditorDelegate);
  }
  virtual void ShutdownModule() override
  {
    FGraphEditorModule& GraphEditorModule = FModuleManager::GetModuleChecked<FGraphEditorModule>( TEXT("GraphEditor") );
    // here I get the error :
    GraphEditorModule.GetAllGraphEditorContextMenuExtender().Remove(EditorDelegate);
  }
};

Error:

invalid operands to binary expression (‘ElementType’ (aka ‘TBaseDelegate, const TSharedRef, const UEdGraph *, const UEdGraphNode *, const UEdGraphPin *, bool>’) and ‘const ElementType’ (aka ‘const TBaseDelegate, const TSharedRef, const UEdGraph *, const UEdGraphNode *, const UEdGraphPin *, bool>’))

Error thrown here