Delete BUILT_PRODUCT_MANIFEST.

Unused.
Bug: 147915920
Test: builds

Change-Id: Ifda795823e209f7be9fed9c45977eff74fbb9769
diff --git a/vintfdata/Android.mk b/vintfdata/Android.mk
index b345308..5d8cdaf 100644
--- a/vintfdata/Android.mk
+++ b/vintfdata/Android.mk
@@ -98,7 +98,6 @@
 
 LOCAL_PREBUILT_MODULE_FILE := $(GEN)
 include $(BUILD_PREBUILT)
-BUILT_PRODUCT_MANIFEST := $(LOCAL_BUILT_MODULE)
 endif
 
 VINTF_VNDK_VERSION :=