[][openwrt-24][common][config][Remove unused file from unified autobuild]

[Description]
Remove unused file from unified autobuild

[Release-log]
N/A

Change-Id: Id3460a80d226bc209c50e9d9443bf168d1ace6b1
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/9686331
diff --git a/autobuild/unified/scripts/openwrt_kconfig.mk b/autobuild/unified/scripts/openwrt_kconfig.mk
deleted file mode 100644
index 4c1e930..0000000
--- a/autobuild/unified/scripts/openwrt_kconfig.mk
+++ /dev/null
@@ -1,20 +0,0 @@
-
-include Makefile
-
-savedefconfig: scripts/config/conf prepare-tmpinfo FORCE
-	[ -e .config ] && { \
-		$< --$@=$(if $(CONFIG_FILE),$(CONFIG_FILE),defconfig) Config.in && \
-			printf "Default config file saved to defconfig\n"; \
-	} || { \
-		printf ".config not exist!\n" >&2; \
-		false; \
-	}
-
-loaddefconfig: scripts/config/conf prepare-tmpinfo FORCE
-	[ -e "$(CONFIG_FILE)" ] && { \
-		[ -L .config ] && export KCONFIG_OVERWRITECONFIG=1; \
-			$< --defconfig=$(CONFIG_FILE) Config.in; \
-	} || { \
-		printf "Default config file not specified by CONFIG_FILE= !\n" >&2; \
-		false; \
-	}