etc/init.d/zfs-functions.in: remove arch warning

Remove the x86_64 warning, it's no longer the case that this is the
only supported architecture.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Georgy Yakovlev <gyakovlev@gentoo.org>
Closes: openzfs#9177

etc/init.d/zfs-functions.in

@@ -294,13 +294,6 @@ checksystem()
 	# Just make sure that /dev/zfs is created.
 	udev_trigger
 
-	if ! [ "$(uname -m)" = "x86_64" ]; then
-		echo "Warning: You're not running 64bit. Currently native zfs in";
-		echo "         Linux is only supported and tested on 64bit.";
-		# should we break here? People doing this should know what they
-		# do, thus i'm not breaking here.
-	fi
-
 	return 0
 }