diff --git a/core/definitions.mk b/core/definitions.mk
index 985d23465..3f4542c7c 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2181,25 +2181,6 @@ $(hide) java -classpath $(EMMA_JAR) emma instr -outmode fullcopy -outfile \
     $(addprefix -ix , $(PRIVATE_EMMA_COVERAGE_FILTER))
 endef
 
-#TODO: use a smaller -Xmx value for most libraries;
-#      only core.jar and framework.jar need a heap this big.
-define transform-classes.jar-to-dex
-@echo "target Dex: $(PRIVATE_MODULE)"
-@mkdir -p $(dir $@)
-$(hide) rm -f $(dir $@)classes*.dex
-$(hide) $(DX) \
-    -JXms16M -JXmx2048M \
-    --dex --output=$(dir $@) \
-    $(if $(NO_OPTIMIZE_DX), \
-        --no-optimize) \
-    $(if $(GENERATE_DEX_DEBUG), \
-	    --debug --verbose \
-	    --dump-to=$(@:.dex=.lst) \
-	    --dump-width=1000) \
-    $(PRIVATE_DX_FLAGS) \
-    $<
-endef
-
 # Create a mostly-empty .jar file that we'll add to later.
 # The MacOS jar tool doesn't like creating empty jar files,
 # so we need to give it something.
diff --git a/core/host_dalvik_java_library.mk b/core/host_dalvik_java_library.mk
index 693a105c1..89139a80e 100644
--- a/core/host_dalvik_java_library.mk
+++ b/core/host_dalvik_java_library.mk
@@ -102,10 +102,6 @@ $(full_classes_jar): $(full_classes_jarjar_jar) | $(ACP)
 	$(hide) $(ACP) -fp $< $@
 
 ifndef LOCAL_JACK_ENABLED
-$(built_dex): PRIVATE_INTERMEDIATES_DIR := $(intermediates.COMMON)
-$(built_dex): PRIVATE_DX_FLAGS := $(LOCAL_DX_FLAGS)
-$(built_dex): $(full_classes_jar) $(DX)
-	$(transform-classes.jar-to-dex)
 
 $(LOCAL_BUILT_MODULE): PRIVATE_DEX_FILE := $(built_dex)
 $(LOCAL_BUILT_MODULE): PRIVATE_SOURCE_ARCHIVE := $(full_classes_jarjar_jar)
diff --git a/core/java.mk b/core/java.mk
index db6bcde6f..00680a909 100644
--- a/core/java.mk
+++ b/core/java.mk
@@ -598,8 +598,6 @@ $(built_dex_intermediate): PRIVATE_DX_FLAGS := $(LOCAL_DX_FLAGS)
 ifeq ($(LOCAL_EMMA_INSTRUMENT),true)
 $(built_dex_intermediate): PRIVATE_DX_FLAGS += --no-locals
 endif
-$(built_dex_intermediate): $(full_classes_proguard_jar) $(DX)
-	$(transform-classes.jar-to-dex)
 endif # LOCAL_JACK_ENABLED is disabled
 
 $(built_dex): $(built_dex_intermediate) | $(ACP)