init: fix removal warning for deprecated initrd loading

This won't be removed in 2021, no matter how hard we try.

Link: https://lkml.kernel.org/r/20241218123638.34907-1-martink@posteo.de


Signed-off-by: Martin Kepplinger <martink@posteo.de>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Joel Granados <joel.granados@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>