Hide registered commands from Shotgun menu

I would like to remove the “Publish…” item (for tk-multi-publish2) from the Shotgun menu, on a per-application basis. We have a workflow where we would only like our artists to begin publishing from elsewhere. We have added a publish button but would now like to remove it from the Menu.

It seems to me like any commands registered with the engine are placed in that menu, but is there any way to override this through configuration? I do still need the command registered with the engine.