Remove LOCAL_DONT_DELETE_JAR_DIRS

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Test: m checkbuild
Change-Id: I896fc6b889aab556c6983c374421e4c5381af54d
diff --git a/core/definitions.mk b/core/definitions.mk
index 8393e4c..35d70cb 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2361,8 +2361,7 @@
 define initialize-package-file
 @mkdir -p $(dir $(2))
 $(hide) cp -f $(1) $(2)
-$(hide) zip -qd $(2) "*.class" \
-    $(if $(strip $(PRIVATE_DONT_DELETE_JAR_DIRS)),,"*/") \
+$(hide) zip -qd $(2) "*.class" "*/" \
     || true # Ignore the error when nothing to delete.
 endef