Update example local.conf within README.rst

glance registry was deprecated in Queens and removed by change I75014bd50b in Victoria.

Closes-Bug: 1939322
Change-Id: I6f7278c9d60f17dbd75e9a07fc489e9ec5d487b2
diff --git a/README.rst b/README.rst
index 3fd608a..ad536b8 100644
--- a/README.rst
+++ b/README.rst
@@ -34,7 +34,7 @@
     SYSLOG=False
     LOG_COLOR=False
     RECLONE=yes
-    ENABLED_SERVICES=c-api,c-bak,c-sch,c-vol,cinder,dstat,g-api,g-reg,key
+    ENABLED_SERVICES=c-api,c-bak,c-sch,c-vol,cinder,dstat,g-api,key
     ENABLED_SERVICES+=,mysql,n-api,n-cond,n-cpu,n-crt,n-sch,rabbit,tempest,placement-api
     CINDER_ENABLED_BACKENDS=lvmdriver-1
     CINDER_DEFAULT_VOLUME_TYPE=lvmdriver-1