mtd: spi-nor: Remove recently added set_4byte() call

Remove undocumented set_4byte() call. This was added in commit
5d40b3d384dc ("mtd: spi-nor: Add parallel and stacked memories support")
without any explanation in the commit message. Remove it.

Fixes: 5d40b3d384dc ("mtd: spi-nor: Add parallel and stacked memories support")
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/mtd/spi/spi-nor-core.c b/drivers/mtd/spi/spi-nor-core.c
index 0b131ad..3114281 100644
--- a/drivers/mtd/spi/spi-nor-core.c
+++ b/drivers/mtd/spi/spi-nor-core.c
@@ -4593,7 +4593,6 @@
 #else
 	/* Configure the BAR - discover bank cmds and read current bank */
 	nor->addr_width = 3;
-	set_4byte(nor, info, 0);
 	ret = read_bar(nor, info);
 	if (ret < 0)
 		return ret;