[ovn] Wipe off mysql settings

To be consistent with basic neutron classes mysql
settings should be defined on cluster level.

Change-Id: Icbcc874168edb1eafe3acb0ebfa4ed0c16310b7a
Closes-Bug: PROD-28898
diff --git a/neutron/control/ovn/single.yml b/neutron/control/ovn/single.yml
index f3dd749..5305fc9 100644
--- a/neutron/control/ovn/single.yml
+++ b/neutron/control/ovn/single.yml
@@ -40,17 +40,3 @@
         db-sb-create-insecure-remote: 'yes'
         db-nb-addr: ${_param:single_address}
         db-sb-addr: ${_param:single_address}
-  mysql:
-    server:
-      database:
-        neutron:
-          encoding: utf8
-          users:
-          - name: neutron
-            password: ${_param:mysql_neutron_password}
-            host: '%'
-            rights: all
-          - name: neutron
-            password: ${_param:mysql_neutron_password}
-            host: ${_param:cluster_local_address}
-            rights: all