configs: mt8183: remove config_distro_bootcmd.h include

When exporting the U-Boot environment for Pumpkin with the following:

ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- \
           scripts/get_default_envs.sh > u-boot-initial-env

We can observe that the bootcmd is defined twice:

bootcmd=run distro_bootcmd
bootcmd=load_splashscreen [...]

Dependening on the the output of get_default_env.sh we have very
different boot behaviours, which is confusing.

Remove the include to <config_distro_bootcmd.h> to which deletes the
unneeded occurence of bootcmd definition.

Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
diff --git a/include/configs/mt8183.h b/include/configs/mt8183.h
index cfdd78d..35025db 100644
--- a/include/configs/mt8183.h
+++ b/include/configs/mt8183.h
@@ -34,9 +34,6 @@
 #define CONFIG_SYS_MMC_ENV_PART		2
 #define CONFIG_ENV_OFFSET		0
 
-/* Environment settings */
-#include <config_distro_bootcmd.h>
-
 #ifdef CONFIG_MTK_ANDROID
 #define MMCBOOT \
 	"mmcdev=0\0" \