nand: Remove unused CONFIG_MTD_NAND_ECC_JFFS2 option

This option was removed along with legacy NAND support in
be33b046b549ad88c204c209508cd7657232ffbd.  Clean up some remnants.

Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
diff --git a/doc/README.nand b/doc/README.nand
index dee0e00..46d7edd 100644
--- a/doc/README.nand
+++ b/doc/README.nand
@@ -99,12 +99,6 @@
    CONFIG_CMD_NAND_TORTURE
       Enables the torture command (see description of this command below).
 
-   CONFIG_MTD_NAND_ECC_JFFS2
-      Define this if you want the Error Correction Code information in
-      the out-of-band data to be formatted to match the JFFS2 file system.
-      CONFIG_MTD_NAND_ECC_YAFFS would be another useful choice for
-      someone to implement.
-
    CONFIG_SYS_MAX_NAND_DEVICE
       The maximum number of NAND devices you want to support.
 
@@ -312,12 +306,6 @@
 NOTE:
 =====
 
-The current NAND implementation is based on what is in recent
-Linux kernels.  The old legacy implementation has been removed.
-
-If you have board code which used CONFIG_NAND_LEGACY, you'll need
-to convert to the current NAND interface for it to continue to work.
-
 The Disk On Chip driver is currently broken and has been for some time.
 There is a driver in drivers/mtd/nand, taken from Linux, that works with
 the current NAND system but has not yet been adapted to the u-boot
diff --git a/include/configs/ethernut5.h b/include/configs/ethernut5.h
index ce61a16..b79000e 100644
--- a/include/configs/ethernut5.h
+++ b/include/configs/ethernut5.h
@@ -153,7 +153,6 @@
 
 /* JFFS2 */
 #ifdef CONFIG_CMD_JFFS2
-#define CONFIG_MTD_NAND_ECC_JFFS2
 #define CONFIG_JFFS2_CMDLINE
 #define CONFIG_JFFS2_NAND
 #endif