Its last usage was dropped back in 2013 in the commit b95bdc8ab56e
("kernel/base-files: clean up old code related to refreshing mtd
partitions, it is no longer used anywhere").
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
(cherry picked from commit f58ca6ee57b77350c69639defdceacb2e77e2249)