configs/roc_pc_rk3399: remove defconfig

Commit 5370ec74516495a4ac6c0bc9780b8e92a2f1e6b1 was supposed to remove
the roc_pc_rk3399 defconfig. It actually removed everything related to
this defconfig, but not the defconfig itself.

The build failure this commit was supposed to fix is therefore still
happening. We fix it up by finally removing the defconfig.

Fixes:

  https://gitlab.com/buildroot.org/buildroot/-/jobs/3372859807

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

configs/roc_pc_rk3399_defconfig

@@ -1,55 +0,0 @@
-# Architecture
-BR2_aarch64=y
-BR2_cortex_a72_a53=y
-
-# Linux headers same as kernel, a 5.4 series
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_5_4=y
-
-# Firmware
-BR2_TARGET_ARM_TRUSTED_FIRMWARE=y
-BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_GIT=y
-BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_REPO_URL="https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git"
-BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_REPO_VERSION="11a0a46a899fcc3b1fdb214b382f3d7495d88eca"
-BR2_TARGET_ARM_TRUSTED_FIRMWARE_PLATFORM="rk3399"
-BR2_TARGET_ARM_TRUSTED_FIRMWARE_BL31=y
-BR2_TARGET_ARM_TRUSTED_FIRMWARE_NEEDS_ARM32_TOOLCHAIN=y
-BR2_TARGET_ARM_TRUSTED_FIRMWARE_IMAGES=""
-
-# Bootloader
-BR2_TARGET_UBOOT=y
-BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
-BR2_TARGET_UBOOT_CUSTOM_VERSION=y
-BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2020.01"
-BR2_TARGET_UBOOT_BOARD_DEFCONFIG="roc-pc-rk3399"
-BR2_TARGET_UBOOT_NEEDS_DTC=y
-BR2_TARGET_UBOOT_NEEDS_PYTHON3=y
-BR2_TARGET_UBOOT_NEEDS_ATF_BL31=y
-BR2_TARGET_UBOOT_NEEDS_ATF_BL31_ELF=y
-BR2_TARGET_UBOOT_FORMAT_CUSTOM=y
-BR2_TARGET_UBOOT_FORMAT_CUSTOM_NAME="u-boot.itb"
-BR2_TARGET_UBOOT_SPL=y
-BR2_TARGET_UBOOT_SPL_NAME="idbloader.img"
-
-# Kernel
-BR2_LINUX_KERNEL=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="5.4.18"
-BR2_LINUX_KERNEL_USE_ARCH_DEFAULT_CONFIG=y
-BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_INTREE_DTS_NAME="rockchip/rk3399-roc-pc"
-BR2_LINUX_KERNEL_INSTALL_TARGET=y
-BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
-
-# Filesystem
-BR2_TARGET_GENERIC_HOSTNAME="roc-rk3399-pc"
-BR2_TARGET_GENERIC_ISSUE="Welcome to ROC-RK3399-PC!"
-BR2_TARGET_ROOTFS_EXT2=y
-BR2_TARGET_ROOTFS_EXT2_4=y
-BR2_TARGET_ROOTFS_EXT2_SIZE="120M"
-BR2_PACKAGE_HOST_DOSFSTOOLS=y
-BR2_PACKAGE_HOST_GENIMAGE=y
-BR2_PACKAGE_HOST_MTOOLS=y
-BR2_PACKAGE_HOST_UBOOT_TOOLS=y
-BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
-BR2_ROOTFS_POST_SCRIPT_ARGS="-c board/firefly/roc-rk3399-pc/genimage.cfg"
-BR2_ROOTFS_POST_BUILD_SCRIPT="board/firefly/roc-rk3399-pc/post-build.sh"