Remove BOOT_SIGNER and PRODUCT_SUPPORTS_BOOT_SIGNER

These varaibles are going to be deprecated since we removed VB 1.0
support. This change removes the related references. boot.img can be
verified by a AVB 2.0 hash descriptor now.

Bug: 241044073
Test: atest under build/make
Change-Id: I267da2d591525ffc0cabf92791cf66a36ef8ff62
diff --git a/core/Makefile b/core/Makefile
index e724a43..7603def 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1108,30 +1108,7 @@
 	@echo "make $@: ignoring dependencies"
 	$(foreach b,$(INSTALLED_BOOTIMAGE_TARGET),$(call build_boot_board_avb_enabled,$(b)))
 
-else ifeq (true,$(PRODUCT_SUPPORTS_BOOT_SIGNER)) # BOARD_AVB_ENABLE != true
-
-# $1: boot image target
-define build_boot_supports_boot_signer
-  $(MKBOOTIMG) --kernel $(call bootimage-to-kernel,$(1)) $(INTERNAL_BOOTIMAGE_ARGS) $(INTERNAL_MKBOOTIMG_VERSION_ARGS) $(BOARD_MKBOOTIMG_ARGS) --output $(1)
-  $(BOOT_SIGNER) /boot $@ $(PRODUCT_VERITY_SIGNING_KEY).pk8 $(PRODUCT_VERITY_SIGNING_KEY).x509.pem $(1)
-  $(call assert-max-image-size,$(1),$(call get-bootimage-partition-size,$(1),boot))
-endef
-
-$(INSTALLED_BOOTIMAGE_TARGET): $(MKBOOTIMG) $(INTERNAL_BOOTIMAGE_FILES) $(BOOT_SIGNER)
-	$(call pretty,"Target boot image: $@")
-	$(call build_boot_supports_boot_signer,$@)
-
-$(call declare-1p-container,$(INSTALLED_BOOTIMAGE_TARGET),)
-$(call declare-container-license-deps,$(INSTALLED_BOOTIMAGE_TARGET),$(INTERNAL_BOOTIMAGE_FILES),$(PRODUCT_OUT)/:/)
-
-UNMOUNTED_NOTICE_DEPS += $(INSTALLED_BOOTIMAGE_TARGET)
-
-.PHONY: bootimage-nodeps
-bootimage-nodeps: $(MKBOOTIMG) $(BOOT_SIGNER)
-	@echo "make $@: ignoring dependencies"
-	$(foreach b,$(INSTALLED_BOOTIMAGE_TARGET),$(call build_boot_supports_boot_signer,$(b)))
-
-else ifeq (true,$(PRODUCT_SUPPORTS_VBOOT)) # PRODUCT_SUPPORTS_BOOT_SIGNER != true
+else ifeq (true,$(PRODUCT_SUPPORTS_VBOOT)) # BOARD_AVB_ENABLE != true
 
 # $1: boot image target
 define build_boot_supports_vboot
@@ -1949,7 +1926,6 @@
 $(if $(BOARD_EXT4_SHARE_DUP_BLOCKS),$(hide) echo "ext4_share_dup_blocks=$(BOARD_EXT4_SHARE_DUP_BLOCKS)" >> $(1))
 $(if $(BOARD_FLASH_LOGICAL_BLOCK_SIZE), $(hide) echo "flash_logical_block_size=$(BOARD_FLASH_LOGICAL_BLOCK_SIZE)" >> $(1))
 $(if $(BOARD_FLASH_ERASE_BLOCK_SIZE), $(hide) echo "flash_erase_block_size=$(BOARD_FLASH_ERASE_BLOCK_SIZE)" >> $(1))
-$(if $(PRODUCT_SUPPORTS_BOOT_SIGNER),$(hide) echo "boot_signer=$(PRODUCT_SUPPORTS_BOOT_SIGNER)" >> $(1))
 $(if $(PRODUCT_SUPPORTS_VERITY),$(hide) echo "verity=$(PRODUCT_SUPPORTS_VERITY)" >> $(1))
 $(if $(PRODUCT_SUPPORTS_VERITY),$(hide) echo "verity_key=$(PRODUCT_VERITY_SIGNING_KEY)" >> $(1))
 $(if $(PRODUCT_SUPPORTS_VERITY),$(hide) echo "verity_signer_cmd=$(notdir $(VERITY_SIGNER))" >> $(1))
@@ -2483,12 +2459,6 @@
     $(MKBOOTIMG) $(if $(strip $(2)),--kernel $(strip $(2))) $(INTERNAL_RECOVERYIMAGE_ARGS) \
                  $(INTERNAL_MKBOOTIMG_VERSION_ARGS) \
                  $(BOARD_RECOVERY_MKBOOTIMG_ARGS) --output $(1))
-  $(if $(filter true,$(PRODUCT_SUPPORTS_BOOT_SIGNER)),\
-    $(if $(filter true,$(BOARD_USES_RECOVERY_AS_BOOT)),\
-      $(BOOT_SIGNER) /boot $(1) $(PRODUCT_VERITY_SIGNING_KEY).pk8 $(PRODUCT_VERITY_SIGNING_KEY).x509.pem $(1),\
-      $(BOOT_SIGNER) /recovery $(1) $(PRODUCT_VERITY_SIGNING_KEY).pk8 $(PRODUCT_VERITY_SIGNING_KEY).x509.pem $(1)\
-    )\
-  )
   $(if $(filter true,$(PRODUCT_SUPPORTS_VBOOT)), \
     $(VBOOT_SIGNER) $(FUTILITY) $(1).unsigned $(PRODUCT_VBOOT_SIGNING_KEY).vbpubk $(PRODUCT_VBOOT_SIGNING_KEY).vbprivk $(PRODUCT_VBOOT_SIGNING_SUBKEY).vbprivk $(1).keyblock $(1))
   $(if $(filter true,$(BOARD_USES_RECOVERY_AS_BOOT)), \
@@ -2501,9 +2471,6 @@
 endef
 
 recoveryimage-deps := $(MKBOOTIMG) $(recovery_ramdisk) $(recovery_kernel)
-ifeq (true,$(PRODUCT_SUPPORTS_BOOT_SIGNER))
-  recoveryimage-deps += $(BOOT_SIGNER)
-endif
 ifeq (true,$(PRODUCT_SUPPORTS_VBOOT))
   recoveryimage-deps += $(VBOOT_SIGNER)
 endif