diff --git a/br-ext-chip-novatek/configs/unknown_unknown_nt98566_polcam_defconfig b/br-ext-chip-novatek/configs/unknown_unknown_nt98566_polcam_defconfig
deleted file mode 100644
index 5547b43b..00000000
--- a/br-ext-chip-novatek/configs/unknown_unknown_nt98566_polcam_defconfig
+++ /dev/null
@@ -1,104 +0,0 @@
-# Architecture
-BR2_arm=y
-BR2_cortex_a9=y
-BR2_ARM_EABIHF=y
-BR2_ARM_ENABLE_NEON=y
-BR2_ARM_ENABLE_VFP=y
-BR2_ARM_FPU_VFPV3=y
-BR2_ARM_INSTRUCTIONS_THUMB2=y
-BR2_KERNEL_HEADERS_VERSION=y
-BR2_DEFAULT_KERNEL_VERSION="4.19.91"
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_19=y
-
-# Toolchain
-BR2_PER_PACKAGE_DIRECTORIES=y
-BR2_GCC_VERSION_7_X=y
-BR2_TOOLCHAIN_USES_UCLIBC=y
-BR2_TOOLCHAIN_BUILDROOT_UCLIBC=y
-BR2_TOOLCHAIN_BUILDROOT_LIBC="uclibc"
-# BR2_TOOLCHAIN_USES_MUSL is not set
-# BR2_TOOLCHAIN_BUILDROOT_MUSL is not set
-# BR2_TOOLCHAIN_BUILDROOT_LIBC="musl"
-BR2_TOOLCHAIN_BUILDROOT_CXX=y
-BR2_TOOLCHAIN_BUILDROOT_LOCALE=y
-BR2_TOOLCHAIN_BUILDROOT_USE_SSP=y
-
-# Kernel
-BR2_LINUX_KERNEL=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.19.91"
-BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
-BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="$(BR2_EXTERNAL_NOVATEK_PATH)/board/nt9856x/kernel/nt98566.generic.config"
-BR2_LINUX_KERNEL_UIMAGE=y
-BR2_LINUX_KERNEL_XZ=y
-BR2_LINUX_KERNEL_EXT_NOVATEK_PATCHER=y
-BR2_LINUX_KERNEL_EXT_NOVATEK_PATCHER_LIST="$(BR2_EXTERNAL_NOVATEK_PATH)/board/nt9856x/kernel/patches/ $(BR2_EXTERNAL_NOVATEK_PATH)/board/nt9856x/kernel/overlay"
-
-# Filesystem
-# BR2_TARGET_TZ_INFO is not set
-BR2_TARGET_ROOTFS_CPIO=y
-BR2_TARGET_ROOTFS_SQUASHFS=y
-BR2_TARGET_ROOTFS_SQUASHFS4_XZ=y
-BR2_ROOTFS_OVERLAY="$(TOPDIR)/../general/overlay"
-BR2_ROOTFS_POST_BUILD_SCRIPT="$(TOPDIR)/../scripts/executing_commands_for_$(BR2_TOOLCHAIN_BUILDROOT_LIBC).sh"
-
-# OpenIPC configuration
-BR2_TOOLCHAIN_BUILDROOT_VENDOR="openipc"
-BR2_TARGET_GENERIC_ISSUE="Welcome to OpenIPC v2.2"
-BR2_TARGET_GENERIC_HOSTNAME="openipc-nt98566"
-BR2_GLOBAL_PATCH_DIR="$(TOPDIR)/../general/package/all-patches"
-
-# OpenIPC packages
-BR2_PACKAGE_BUSYBOX_CONFIG="$(TOPDIR)/../general/package/busybox/busybox.config"
-BR2_PACKAGE_DROPBEAR_OPENIPC=y
-# BR2_PACKAGE_FDK_AAC_OPENIPC is not set
-BR2_PACKAGE_FWPRINTENV_OPENIPC=y
-BR2_PACKAGE_HASERL=y
-BR2_PACKAGE_NOVATEK_OSDRV_NT9856X=y
-BR2_PACKAGE_IPCTOOL=y
-BR2_PACKAGE_JSON_C=y
-BR2_PACKAGE_LAME_OPENIPC=y
-BR2_PACKAGE_LIBCURL_OPENIPC=y
-BR2_PACKAGE_LIBCURL_OPENIPC_CURL=y
-# BR2_PACKAGE_LIBCURL_OPENIPC_VERBOSE is not set
-# BR2_PACKAGE_LIBCURL_OPENIPC_PROXY_SUPPORT is not set
-# BR2_PACKAGE_LIBCURL_OPENIPC_COOKIES_SUPPORT is not set
-# BR2_PACKAGE_LIBCURL_OPENIPC_EXTRA_PROTOCOLS_FEATURES is not set
-BR2_PACKAGE_LIBCURL_OPENIPC_MBEDTLS=y
-BR2_PACKAGE_LIBEVENT_OPENIPC=y
-BR2_PACKAGE_LIBEVENT_OPENIPC_REMOVE_PYSCRIPT=y
-BR2_PACKAGE_LIBOGG_OPENIPC=y
-BR2_PACKAGE_LIBWEBSOCKETS_OPENIPC=y
-BR2_PACKAGE_LIBYAML=y
-BR2_PACKAGE_MAJESTIC_FONTS=y
-BR2_PACKAGE_MAJESTIC=y
-BR2_PACKAGE_MBEDTLS_OPENIPC=y
-# BR2_PACKAGE_MBEDTLS_OPENIPC_PROGRAMS is not set
-# BR2_PACKAGE_MBEDTLS_OPENIPC_COMPRESSION is not set
-BR2_PACKAGE_MICROBE_WEB=y
-# BR2_PACKAGE_MINI_SNMPD is not set
-BR2_PACKAGE_MOTORS=y
-BR2_PACKAGE_OPUS_OPENIPC=y
-BR2_PACKAGE_OPUS_OPENIPC_FIXED_POINT=y
-# BR2_PACKAGE_SSHPASS is not set
-BR2_PACKAGE_UACME_OPENIPC=y
-BR2_PACKAGE_VTUND_OPENIPC=y
-BR2_PACKAGE_YAML_CLI=y
-
-# WiFi
-BR2_PACKAGE_WIRELESS_TOOLS=y
-BR2_PACKAGE_WPA_SUPPLICANT=y
-BR2_PACKAGE_WPA_SUPPLICANT_CLI=y
-BR2_PACKAGE_WPA_SUPPLICANT_NL80211=y
-BR2_PACKAGE_WPA_SUPPLICANT_PASSPHRASEy
-# BR2_PACKAGE_LINUX_FIRMWARE is not set
-# BR2_PACKAGE_LINUX_FIRMWARE_MEDIATEK_MT7601U is not set
-# BR2_PACKAGE_RTL8188EU is not set
-
-# WIREGUARD
-BR2_PACKAGE_WIREGUARD_LINUX_COMPAT=y
-BR2_PACKAGE_WIREGUARD_TOOLS=y
-
-# DEBUG
-BR2_PACKAGE_HOST_GDB=y
-BR2_PACKAGE_GDB=y