brcm27xx-armstub: remove package

Apparently, latest RPi firmware doesn't need this to boot RPi 4
64 bit kernels.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

package/kernel/brcm27xx-armstub/Makefile

@@ -1,54 +0,0 @@
-#
-# Copyright (C) 2019 OpenWrt.org
-#
-# This is free software, licensed under the GNU General Public License v2.
-# See /LICENSE for more information.
-#
-
-include $(TOPDIR)/rules.mk
-include $(INCLUDE_DIR)/kernel.mk
-
-PKG_NAME:=brcm27xx-armstub
-
-PKG_SOURCE_PROTO:=git
-PKG_SOURCE_URL=https://github.com/raspberrypi/tools
-PKG_SOURCE_DATE:=2019-05-09
-PKG_SOURCE_VERSION:=49719d5544cd33b8c146235e1420f68cd92420fe
-PKG_MIRROR_HASH:=91e9d14b5f3d7ce7486de7199d15234ce46ead3d87decce77466cd2f28b9e085
-
-PKG_FLAGS:=nonshared
-
-include $(INCLUDE_DIR)/package.mk
-
-define Package/brcm27xx-armstub
-  SECTION:=boot
-  CATEGORY:=Boot Loaders
-  TITLE:=brcm27xx-armstub
-  DEPENDS:=@TARGET_brcm2708
-endef
-
-define Package/brcm27xx-armstub/description
-  ARM stubs for brcm27xx.
-endef
-
-MAKE_PATH = armstubs
-
-MAKE_FLAGS += \
-	CC8=$(TARGET_CC) \
-	LD8=$(TARGET_CROSS)ld \
-	OBJCOPY8=$(TARGET_CROSS)objcopy \
-	OBJDUMP8=$(TARGET_CROSS)objdump
-
-define Build/Compile
-	$(call Build/Compile/Default,armstub8-gic.elf armstub8-gic.bin)
-endef
-
-define Build/InstallDev
-	$(CP) $(PKG_BUILD_DIR)/armstubs/armstub8-gic.bin $(KERNEL_BUILD_DIR)
-endef
-
-define Package/brcm27xx-armstub/install
-	true
-endef
-
-$(eval $(call BuildPackage,brcm27xx-armstub))