grub: take recipe off AUTOREV
grub: take recipe off AUTOREV

The grub recipe only receives a couple updates a year. That is not
sufficiently frequent to warrant being on AUTOREV.

Signed-off-by: Alex Stewart <04cdb2793e4fb0120cc30d1c823099f3862701f4@ni.com>
Natinst-ReviewBoard-ID: 282636

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt