zenfone9: Drop include vendor images Asus

Change-Id: I4fb7df157a1e1821e190716fc345dea6d637f33c
diff --git a/device.mk b/device.mk
index 073e631..612c271 100755
--- a/device.mk
+++ b/device.mk
@@ -20,7 +20,6 @@
 # product configuration (apps).
 #
 $(call inherit-product, vendor/asus/zenfone9/zenfone9-vendor.mk)
-$(call inherit-product, vendor/images/asus/zf9/zf9-app.mk)
 
 # fusefs / disable sdcardfs usage
 $(call inherit-product, $(SRC_TARGET_DIR)/product/emulated_storage.mk)