atv: vendor: Remove adbd_prop references

* This type doesn't exist in vendor on 19.0.

Change-Id: I349b22344c409233f5c251309fb32fa151230da8
diff --git a/atv/vendor/gmscore_app.te b/atv/vendor/gmscore_app.te
index 91c55ec..3b2c9f3 100644
--- a/atv/vendor/gmscore_app.te
+++ b/atv/vendor/gmscore_app.te
@@ -1,3 +1,2 @@
-get_prop(gmscore_app, adbd_prop)
 get_prop(gmscore_app, apexd_prop)
 get_prop(gmscore_app, apk_verity_prop)