Commit 0e19425c77 ("package/libassuan: bump to version 2.5.6") moved
the sha256 hash below a link that provides the hash directly. The key
check comment now appears to refer to license hashes, which does not
make sense.
Remove the redundant key check comment.
Cc: Julien Olivain <ju.o@free.fr>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>