fix: a38x: remove unnecessary environment variables

	only bootcmd and bootcmd_legacy is used for a38x
	- remove unused environment variables boot commands

Change-Id: I1e2e6613b1384c27c94c6dfb760ac81850292e98
Signed-off-by: Bassel Saba <basselsa@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/18552
Reviewed-by: Omri Itach <omrii@marvell.com>
Tested-by: Star_Automation <star@marvell.com>
3 files changed