raid: Remove now superfluous sentinel element from ctl_table array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

Remove sentinel from raid_table

Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

Author: Joelgranados

drivers/md/md.c

@@ -305,7 +305,6 @@ static struct ctl_table raid_table[] = {
 		.mode		= S_IRUGO|S_IWUSR,
 		.proc_handler	= proc_dointvec,
 	},
-	{ }
 };
 
 static int start_readonly;