apalis-imx8: drop obsolete environment variables

Drop obsolete environment variables fdt_addr, finduuid, boot_file,
mmcargs, mmcdev, mmcpart and panel.

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
diff --git a/include/configs/apalis-imx8.h b/include/configs/apalis-imx8.h
index 5d1ee49..a54e018 100644
--- a/include/configs/apalis-imx8.h
+++ b/include/configs/apalis-imx8.h
@@ -29,19 +29,11 @@
 #define CFG_EXTRA_ENV_SETTINGS \
 	BOOTENV \
 	MEM_LAYOUT_ENV_SETTINGS \
-	"boot_file=Image\0" \
 	"boot_script_dhcp=boot.scr\0" \
 	"console=ttyLP1\0" \
-	"fdt_addr=0x83000000\0"	\
 	"fdt_board=eval\0" \
-	"finduuid=part uuid mmc ${mmcdev}:2 uuid\0" \
 	"initrd_addr=0x83800000\0" \
 	"initrd_high=0xffffffffffffffff\0" \
-	"mmcargs=setenv bootargs console=${console},${baudrate} " \
-		"root=PARTUUID=${uuid} rootwait " \
-	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
-	"mmcpart=1\0" \
-	"panel=NULL\0" \
 	"setup=setenv setupargs console=tty1 console=${console},${baudrate} " \
 		"consoleblank=0 earlycon\0" \
 	"update_uboot=askenv confirm Did you load u-boot-dtb.imx (y/N)?; " \