zenfone8: Removing GSI keys

Those keys will be embedded into VtsSecurityAvb on host side
instead, to verify the GSI image used on the device.

Bug: 149806769
Test: build and checks those keys are removed from
      $OUT/recovery/root/first_stage_ramdisk/avb/
Change-Id: I8a002ba6f1421fb460056ccae6572050bdb0ce3c
diff --git a/device.mk b/device.mk
index 6178b2a..a10fb65 100755
--- a/device.mk
+++ b/device.mk
@@ -24,9 +24,6 @@
 # fusefs / disable sdcardfs usage
 $(call inherit-product, $(SRC_TARGET_DIR)/product/emulated_storage.mk)
 
-# Include GSI keys
-$(call inherit-product, $(SRC_TARGET_DIR)/product/gsi_keys.mk)
-
 # Enable updating of APEXes
 $(call inherit-product, $(SRC_TARGET_DIR)/product/updatable_apex.mk)