What:		/sys/firmware/efi/vars
Date:		April 2004, removed March 2023
Description:
		This directory exposed interfaces for interacting with
		EFI variables.  For more information on EFI variables,
		see 'Variable Services' in the UEFI specification
		(section 7.2 in specification version 2.3 Errata D).

		The 'efivars' sysfs interface was removed in March of 2023,
		after being considered deprecated no later than September
		of 2020. Its functionality has been replaced by the
		'efivarfs' filesystem.