Revert "Revert "Remove ro.apex.updatable=false in GSI""

This reverts commit c7f63dfedaaf9f0538c5b4b5f592c517e2e41a14.

Reason for revert: b/145963716

Change-Id: I0f6a9c26b342a27dfebc0494a255492c838c09f5
diff --git a/target/product/gsi_release.mk b/target/product/gsi_release.mk
index faaa935..aee7959 100644
--- a/target/product/gsi_release.mk
+++ b/target/product/gsi_release.mk
@@ -29,12 +29,6 @@
     system/product/% \
     system/system_ext/%
 
-
-# GSI doesn't support apex for now.
-# Properties set in product take precedence over those in vendor.
-PRODUCT_PRODUCT_PROPERTIES += \
-    ro.apex.updatable=false
-
 # Split selinux policy
 PRODUCT_FULL_TREBLE_OVERRIDE := true