Deprecate BOARD_BUILD_GKI_BOOT_IMAGE_WITHOUT_RAMDISK

These variables are no longer used. We don't build GKI in the platform
tree anymore. Remove these vars as we are not maintaining these.

Bug: 229701033
Test: presubmit
Change-Id: If8c978a07094da6a651c1e3f06a437dea9ef52b9
diff --git a/core/Makefile b/core/Makefile
index 09c815e..18f2c39 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1306,11 +1306,8 @@
 INTERNAL_BOOTIMAGE_ARGS := \
 	$(addprefix --second ,$(INSTALLED_2NDBOOTLOADER_TARGET))
 
-# TODO(b/229701033): clean up BOARD_BUILD_GKI_BOOT_IMAGE_WITHOUT_RAMDISK.
-ifneq ($(BOARD_BUILD_GKI_BOOT_IMAGE_WITHOUT_RAMDISK),true)
-  ifneq ($(BUILDING_INIT_BOOT_IMAGE),true)
-    INTERNAL_BOOTIMAGE_ARGS += --ramdisk $(INSTALLED_RAMDISK_TARGET)
-  endif
+ifneq ($(BUILDING_INIT_BOOT_IMAGE),true)
+  INTERNAL_BOOTIMAGE_ARGS += --ramdisk $(INSTALLED_RAMDISK_TARGET)
 endif
 
 ifndef BUILDING_VENDOR_BOOT_IMAGE
@@ -2348,8 +2345,6 @@
 )
 $(if $(filter true,$(BOARD_USES_RECOVERY_AS_BOOT)),\
     $(hide) echo "recovery_as_boot=true" >> $(1))
-$(if $(filter true,$(BOARD_BUILD_GKI_BOOT_IMAGE_WITHOUT_RAMDISK)),\
-    $(hide) echo "gki_boot_image_without_ramdisk=true" >> $(1))
 $(hide) echo "root_dir=$(TARGET_ROOT_OUT)" >> $(1)
 $(if $(filter true,$(PRODUCT_USE_DYNAMIC_PARTITION_SIZE)),\
     $(hide) echo "use_dynamic_partition_size=true" >> $(1))