ubi: remove dead code in validate_vid_hdr()

data_size is already checked against zero when vol_type matches
UBI_VID_STATIC. Remove the following dead code.

Signed-off-by: Jubin Zhong <[e-mail]>
Signed-off-by: Richard Weinberger <[e-mail]>

drivers/mtd/ubi/io.c

···
 				ubi_err(ubi, "bad data_size");
 				goto bad;
 			}
-		} else if (lnum == used_ebs - 1) {
-			if (data_size == 0) {
-				ubi_err(ubi, "bad data_size at last LEB");
-				goto bad;
-			}
-		} else {
+		} else if (lnum > used_ebs - 1) {
 			ubi_err(ubi, "too high lnum");
 			goto bad;
 		}