Revert "Revert "Stop enabling g-reg by default""

This reverts commit 98f3bbe509c2de9efaf4f3fc1b5dbc42d7a67987.

This is no longer necessary as proper fix [1]
is now applied.

[1] https://review.opendev.org/703288

Change-Id: Ibc40f79b1daf30246ed24790e9b305caea497cb2
Related-bug: #1859847
Related-bug: #1860021
diff --git a/stackrc b/stackrc
index 412aca8..b31fb39 100644
--- a/stackrc
+++ b/stackrc
@@ -69,7 +69,7 @@
     # Placement service needed for Nova
     ENABLED_SERVICES+=,placement-api,placement-client
     # Glance services needed for Nova
-    ENABLED_SERVICES+=,g-api,g-reg
+    ENABLED_SERVICES+=,g-api
     # Cinder
     ENABLED_SERVICES+=,c-sch,c-api,c-vol
     # Neutron