md: Fix static checker warning in analyze_sbs

The following warn is reported:

 drivers/md/md.c:3912 analyze_sbs()
 warn: iterator 'i' not incremented

Fixes: d8730f0 ("md: Remove deprecated CONFIG_MD_MULTIPATH")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/linux-raid/7e2e95ce-3740-09d8-a561-af6bfb767f18@huaweicloud.com/T/#t
Signed-off-by: Li Nan <linan122@huawei.com>
Link: https://lore.kernel.org/linux-raid/20251215124412.4015572-1-linan666@huaweicloud.com
Signed-off-by: Yu Kuai <yukuai@fnnas.com>

Author: Li Nan

drivers/md/md.c

@@ -3882,7 +3882,6 @@ static struct md_rdev *md_import_device(dev_t newdev, int super_format, int supe
 
 static int analyze_sbs(struct mddev *mddev)
 {
-	int i;
 	struct md_rdev *rdev, *freshest, *tmp;
 
 	freshest = NULL;
@@ -3909,11 +3908,9 @@ static int analyze_sbs(struct mddev *mddev)
 	super_types[mddev->major_version].
 		validate_super(mddev, NULL/*freshest*/, freshest);
 
-	i = 0;
 	rdev_for_each_safe(rdev, tmp, mddev) {
 		if (mddev->max_disks &&
-		    (rdev->desc_nr >= mddev->max_disks ||
-		     i > mddev->max_disks)) {
+		    rdev->desc_nr >= mddev->max_disks) {
 			pr_warn("md: %s: %pg: only %d devices permitted\n",
 				mdname(mddev), rdev->bdev,
 				mddev->max_disks);