mtd: mtdswap: Remove redundant assignment of pointer eb

The pointer eb is being assigned a value that is never read, it is
being updated later on. The assignment is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210910120023.46308-1-colin.king@canonical.com

drivers/mtd/mtdswap.c

@@ -716,7 +716,6 @@ static int mtdswap_move_block(struct mtdswap_dev *d, unsigned int oldblock,
 		return ret;
 	}
 
-	eb = d->eb_data + *newblock / d->pages_per_eblk;
 	d->page_data[page] = *newblock;
 	d->revmap[oldblock] = PAGE_UNDEF;
 	eb = d->eb_data + oldblock / d->pages_per_eblk;