armv8: lx2160: Drop useless CONFIG_CMDLINE_EDITING from config.h

commit 58c3e620 ("armv8: lx2160ardb : Add support for LX2160ARDB
platform") brought a new boards support with redundancy in the config.h.

One of them is CONFIG_CMDLINE_EDITING which is removed by this change.

Cc: Priyanka Jain <priyanka.jain@nxp.com>
Cc: Peng Ma <peng.ma@nxp.com>
Cc: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: NPrabhakar Kushwaha <prabhakar.kushwaha@nxp.com>

include/configs/lx2160a_common.h

@@ -187,7 +187,6 @@ unsigned long get_board_ddr_clk(void);
 #define CONFIG_SYS_PBSIZE		(CONFIG_SYS_CBSIZE + \
 					sizeof(CONFIG_SYS_PROMPT) + 16)
 #define CONFIG_SYS_BARGSIZE		CONFIG_SYS_CBSIZE /* Boot args buffer */
-#define CONFIG_CMDLINE_EDITING		1
 #define CONFIG_SYS_MAXARGS		64	/* max command args */
 
 #define CONFIG_SYS_BOOTM_LEN   (64 << 20)      /* Increase max gunzip size */