Remove incremental workaround for aapt overlays

This workaround to clean package intermediates is no longer necessary,
as ninja reruns commands whose command line changes.

Test: switch between product overlays that use add-resource, verify
      R.java is regenerated.
Change-Id: Icb1f76360e39882e4401180414a031956777b020
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 3c8d6ce..a3b5f3c 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -374,6 +374,9 @@
 # $(PRODUCT_OUT)/recovery/root/sdcard goes from symlink to folder.
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/recovery/root/sdcard)
 
+$(call add-clean-step, rm -rf $(TARGET_OUT_COMMON_INTERMEDIATES)/APPS/previous_overlays.txt)
+$(call add-clean-step, rm -rf $(TARGET_OUT_COMMON_INTERMEDIATES)/APPS/current_packages.txt)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************