diff --git a/core/soong_config.mk b/core/soong_config.mk
index c91639c..cbc2dd1 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -32,7 +32,6 @@
 $(call add_json_str,  Platform_sdk_codename,             $(PLATFORM_VERSION_CODENAME))
 $(call add_json_bool, Platform_sdk_final,                $(filter REL,$(PLATFORM_VERSION_CODENAME)))
 $(call add_json_csv,  Platform_version_active_codenames, $(PLATFORM_VERSION_ALL_CODENAMES))
-$(call add_json_csv,  Platform_version_future_codenames, $(PLATFORM_VERSION_FUTURE_CODENAMES))
 $(call add_json_str,  Platform_security_patch,           $(PLATFORM_SECURITY_PATCH))
 $(call add_json_str,  Platform_preview_sdk_version,      $(PLATFORM_PREVIEW_SDK_VERSION))
 $(call add_json_str,  Platform_base_os,                  $(PLATFORM_BASE_OS))
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 811bcd8..fe71d7b 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -123,8 +123,8 @@
     PLATFORM_VERSION_CODENAME := $(TARGET_PLATFORM_VERSION)
   endif
 
-  # This is all of the *active* development codenames. There are future
-  # codenames not included in this list. This confusing name is needed because
+  # This is all of the *active* development codenames.
+  # This confusing name is needed because
   # all_codenames has been baked into build.prop for ages.
   #
   # Should be either the same as PLATFORM_VERSION_CODENAME or a comma-separated
@@ -141,29 +141,14 @@
     $(if $(filter $(_codename),$(PLATFORM_VERSION_ALL_CODENAMES)),,\
       $(eval PLATFORM_VERSION_ALL_CODENAMES += $(_codename))))
 
-  # This is all of the inactive development codenames. Available to be targeted
-  # in this branch but in the future relative to our current target.
-  PLATFORM_VERSION_FUTURE_CODENAMES :=
-
-  # Build a list of all untargeted code names. Avoid duplicates.
-  _versions_not_in_target := \
-    $(filter-out $(PLATFORM_VERSION_ALL_CODENAMES),$(ALL_VERSIONS))
-  $(foreach version,$(_versions_not_in_target),\
-    $(eval _codename := $(PLATFORM_VERSION_CODENAME.$(version)))\
-    $(if $(filter $(_codename),$(PLATFORM_VERSION_FUTURE_CODENAMES)),,\
-      $(eval PLATFORM_VERSION_FUTURE_CODENAMES += $(_codename))))
-
   # And convert from space separated to comma separated.
   PLATFORM_VERSION_ALL_CODENAMES := \
     $(subst $(space),$(comma),$(strip $(PLATFORM_VERSION_ALL_CODENAMES)))
-  PLATFORM_VERSION_FUTURE_CODENAMES := \
-    $(subst $(space),$(comma),$(strip $(PLATFORM_VERSION_FUTURE_CODENAMES)))
 
 endif
 .KATI_READONLY := \
   PLATFORM_VERSION_CODENAME \
-  PLATFORM_VERSION_ALL_CODENAMES \
-  PLATFORM_VERSION_FUTURE_CODENAMES
+  PLATFORM_VERSION_ALL_CODENAMES
 
 ifeq (REL,$(PLATFORM_VERSION_CODENAME))
   PLATFORM_PREVIEW_SDK_VERSION := 0