apalis/colibri-imx8/8x: remove global variable script

The distroboot script system scans boot_scripts variable and
try to find and use to boot each script name mentioned there.
Setting global variable "script" breaks this general mechanism
of searching and running a distro boot script.
Remove global variables "script" to fix working the general
distro boot script mechanism.

Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@toradex.com>
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@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 a8b2b07..df43126 100644
--- a/include/configs/apalis-imx8.h
+++ b/include/configs/apalis-imx8.h
@@ -47,7 +47,6 @@
 	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
 	"mmcpart=1\0" \
 	"panel=NULL\0" \
-	"script=boot.scr\0" \
 	"update_uboot=askenv confirm Did you load u-boot-dtb.imx (y/N)?; " \
 		"if test \"$confirm\" = \"y\"; then " \
 		"setexpr blkcnt ${filesize} + 0x1ff && setexpr blkcnt " \
diff --git a/include/configs/colibri-imx8x.h b/include/configs/colibri-imx8x.h
index 2de116c..3ec36aa 100644
--- a/include/configs/colibri-imx8x.h
+++ b/include/configs/colibri-imx8x.h
@@ -77,7 +77,6 @@
 	"mmcdev=" __stringify(CONFIG_SYS_MMC_ENV_DEV) "\0" \
 	"mmcpart=1\0" \
 	"panel=NULL\0" \
-	"script=boot.scr\0" \
 	"update_uboot=askenv confirm Did you load u-boot-dtb.imx (y/N)?; " \
 		"if test \"$confirm\" = \"y\"; then " \
 		"setexpr blkcnt ${filesize} + 0x1ff && setexpr blkcnt " \