diff --git a/core/Makefile b/core/Makefile
index e724a43e80..7603def34a 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1108,30 +1108,7 @@ bootimage-nodeps: $(MKBOOTIMG) $(AVBTOOL) $(BOARD_AVB_BOOT_KEY_PATH) $(INTERNAL_
 	@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 $(BOARD_EROFS_USE_LEGACY_COMPRESSION),$(hide) echo "erofs_use_legacy_compre
 $(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 @@ define build-recoveryimage-target
     $(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 @@ define build-recoveryimage-target
 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
diff --git a/core/config.mk b/core/config.mk
index c0dea95e33..8fb07fb470 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -161,7 +161,7 @@ $(KATI_obsolete_var TARGET_NO_VENDOR_BOOT,Use PRODUCT_BUILD_VENDOR_BOOT_IMAGE in
 $(KATI_obsolete_var PRODUCT_CHECK_ELF_FILES,Use BUILD_BROKEN_PREBUILT_ELF_FILES instead)
 $(KATI_obsolete_var ALL_GENERATED_SOURCES,ALL_GENERATED_SOURCES is no longer used)
 $(KATI_obsolete_var ALL_ORIGINAL_DYNAMIC_BINARIES,ALL_ORIGINAL_DYNAMIC_BINARIES is no longer used)
-
+$(KATI_obsolete_var PRODUCT_SUPPORTS_BOOT_SIGNER,VB 1.0 and related variables are no longer supported)
 # Used to force goals to build.  Only use for conditionally defined goals.
 .PHONY: FORCE
 FORCE:
@@ -629,7 +629,6 @@ APPEND2SIMG := $(HOST_OUT_EXECUTABLES)/append2simg
 VERITY_SIGNER := $(HOST_OUT_EXECUTABLES)/verity_signer
 BUILD_VERITY_METADATA := $(HOST_OUT_EXECUTABLES)/build_verity_metadata
 BUILD_VERITY_TREE := $(HOST_OUT_EXECUTABLES)/build_verity_tree
-BOOT_SIGNER := $(HOST_OUT_EXECUTABLES)/boot_signer
 FUTILITY := $(HOST_OUT_EXECUTABLES)/futility-host
 VBOOT_SIGNER := $(HOST_OUT_EXECUTABLES)/vboot_signer
 FEC := $(HOST_OUT_EXECUTABLES)/fec
diff --git a/core/product.mk b/core/product.mk
index 73513134b5..2e0c9a7d85 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -136,7 +136,6 @@ _product_list_vars += PRODUCT_BOOT_JARS
 # PRODUCT_BOOT_JARS, so that device-specific jars go after common jars.
 _product_list_vars += PRODUCT_BOOT_JARS_EXTRA
 
-_product_single_value_vars += PRODUCT_SUPPORTS_BOOT_SIGNER
 _product_single_value_vars += PRODUCT_SUPPORTS_VBOOT
 _product_single_value_vars += PRODUCT_SUPPORTS_VERITY
 _product_single_value_vars += PRODUCT_SUPPORTS_VERITY_FEC
diff --git a/target/product/verity.mk b/target/product/verity.mk
index 5f09283f06..81da64c643 100644
--- a/target/product/verity.mk
+++ b/target/product/verity.mk
@@ -16,7 +16,6 @@
 
 # Provides dependencies necessary for verified boot.
 
-PRODUCT_SUPPORTS_BOOT_SIGNER := true
 PRODUCT_SUPPORTS_VERITY := true
 PRODUCT_SUPPORTS_VERITY_FEC := true