mtd: nand: remove duplicate comment line

Commit 7854d3f7495b1 ("mtd: spelling, capitalization, uniformity") added
a correctly spelled line, but failed to remove the wrongly spelled one.
Commit 064a7694b534 ("mtd: Fix typo mtd/tests") then fixed the spelling
again, but left the duplication.

Fixes: 7854d3f7495b1 ("mtd: spelling, capitalization, uniformity")
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/nand/nand_base.c

@@ -156,7 +156,6 @@ static uint8_t nand_read_byte(struct mtd_info *mtd)
 }
 
 /**
- * nand_read_byte16 - [DEFAULT] read one byte endianness aware from the chip
  * nand_read_byte16 - [DEFAULT] read one byte endianness aware from the chip
  * @mtd: MTD device structure
  *