ARM: configs: aspeed_g4: Remove appended DTB and ATAG

These machines boot using FIT and have done so since support was merged,
so neither option is used.
Signed-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/configs/aspeed_g4_defconfig

@@ -24,8 +24,6 @@ CONFIG_VMSPLIT_2G=y
 CONFIG_AEABI=y
 CONFIG_UACCESS_WITH_MEMCPY=y
 # CONFIG_ATAGS is not set
-CONFIG_ARM_APPENDED_DTB=y
-CONFIG_ARM_ATAG_DTB_COMPAT=y
 CONFIG_KEXEC=y
 CONFIG_JUMP_LABEL=y
 CONFIG_STRICT_KERNEL_RWX=y