Remove dexpreopting of boot jars from Make

Dexpreopting of boot jars is now implemented in
build/soong/java/dexpreopt_bootjars.go.

Test: m checkbuild
Change-Id: I036510e7674b876976ce191c5b18bf0b7a15c6ee
diff --git a/CleanSpec.mk b/CleanSpec.mk
index d66ac1e..f95f0a7 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -595,6 +595,10 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib*/libvixl.so)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib*/libvixld.so)
 
+# Clean up old location of dexpreopted boot jars
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/dex_bootjars)
+$(call add-clean-step, rm -rf $(PRODUCT_OUT)/dex_bootjars_input)
+
 # ************************************************
 # NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
 # ************************************************