diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 7d79baf..6e1cb68 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -74,7 +74,6 @@
 LOCAL_DROIDDOC_CUSTOM_ASSET_DIR:=
 LOCAL_DROIDDOC_CUSTOM_TEMPLATE_DIR:=
 LOCAL_DROIDDOC_DOC_ZIP :=
-LOCAL_DROIDDOC_JDIFF_DOC_ZIP :=
 LOCAL_DROIDDOC_HTML_DIR:=
 LOCAL_DROIDDOC_METADATA_ZIP:=
 LOCAL_DROIDDOC_OPTIONS:=
diff --git a/core/soong_droiddoc_prebuilt.mk b/core/soong_droiddoc_prebuilt.mk
index c0467df..4dc5d08 100644
--- a/core/soong_droiddoc_prebuilt.mk
+++ b/core/soong_droiddoc_prebuilt.mk
@@ -29,16 +29,6 @@
 $(eval $(call copy-one-file,$(LOCAL_DROIDDOC_API_VERSIONS_XML),$(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/$(LOCAL_MODULE)_generated-api-versions.xml))
 endif
 
-ifdef LOCAL_DROIDDOC_JDIFF_DOC_ZIP
-$(eval $(call copy-one-file,$(LOCAL_DROIDDOC_JDIFF_DOC_ZIP),$(OUT_DOCS)/$(LOCAL_MODULE)-jdiff-docs.zip))
-$(call dist-for-goals,docs,$(OUT_DOCS)/$(LOCAL_MODULE)-jdiff-docs.zip)
-
-ALL_DOCS += $(OUT_DOCS)/$(LOCAL_MODULE)-jdiff-docs.zip
-
-.PHONY: $(LOCAL_MODULE) $(LOCAL_MODULE)-jdiff
-$(LOCAL_MODULE) $(LOCAL_MODULE)-jdiff : $(OUT_DOCS)/$(LOCAL_MODULE)-jdiff-docs.zip
-endif
-
 ifdef LOCAL_DROIDDOC_METADATA_ZIP
 $(eval $(call copy-one-file,$(LOCAL_DROIDDOC_METADATA_ZIP),$(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/$(LOCAL_MODULE)-metadata.zip))
 endif
diff --git a/core/tasks/apidiff.mk b/core/tasks/apidiff.mk
deleted file mode 100644
index 76e4749..0000000
--- a/core/tasks/apidiff.mk
+++ /dev/null
@@ -1,21 +0,0 @@
-# Copyright (C) 2017 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-#
-# Rules for building API diffs.
-#
-
-.PHONY: api-diff
-
-api-diff: api-stubs-docs-jdiff