The old clean target had bit rotted.

Clean and clobber are now the same thing.

Change-Id: I4873d40496b16e13689e22c48cff1fecdffb8b40

core/main.mk

@@ -774,23 +774,13 @@ $(call dist-for-goals,sdk, \
 findbugs: $(INTERNAL_FINDBUGS_HTML_TARGET) $(INTERNAL_FINDBUGS_XML_TARGET)
 
 .PHONY: clean
-dirs_to_clean := \
-	$(PRODUCT_OUT) \
-	$(TARGET_COMMON_OUT_ROOT) \
-	$(HOST_OUT) \
-	$(HOST_COMMON_OUT_ROOT)
 clean:
-	@for dir in $(dirs_to_clean) ; do \
-	    echo "Cleaning $$dir..."; \
-	    rm -rf $$dir; \
-	done
-	@echo "Clean."; \
-
-.PHONY: clobber
-clobber:
 	@rm -rf $(OUT_DIR)
 	@echo "Entire build directory removed."
 
+.PHONY: clobber
+clobber: clean
+
 # The rules for dataclean and installclean are defined in cleanbuild.mk.
 
 #xxx scrape this from ALL_MODULE_NAME_TAGS