opencore bootloader menu: cannot get rid of "EFI" menu item

The OpenCore documentation says: "HideSelf: If you want to hide EFI partion on OpenCore Bootloader choose YES"

But apparently HideSelf has been removed in a recent version. I added it to my config.plist and was given an error saying it wasn't valid.

That seems like exactly the setting I need to get rid of the "EFI" menu item that is definitely the EFI partition from my Success' href='/2020/12/install-macos-catalina-on-supported-pc.html'>Catalina Hackintosh. But that setting no longer exists.

How can I get rid of this?

Author: @thommstark