mtd: onenand: remove redundant variable ooblen

Variable ooblen is being initialized with a value that is never read.
The variable is never used after this, so it is redundant and can be
removed.

Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Miquel Raynal <[e-mail]>
Link: https://lore.kernel.org/linux-mtd/[e-mail]

drivers/mtd/nand/onenand/onenand_bbt.c

···
 	int i, j, numblocks, len, scanlen;
 	int startblock;
 	loff_t from;
-	size_t readlen, ooblen;
+	size_t readlen;
 	struct mtd_oob_ops ops;
 	int rgn;
 
···
 	len = 2;
 
 	/* We need only read few bytes from the OOB area */
-	scanlen = ooblen = 0;
+	scanlen = 0;
 	readlen = bd->len;
 
 	/* chip == -1 case only */