removed ops-db from required properties

inventory_provider/config.py

@@ -221,7 +221,6 @@ CONFIG_SCHEMA = {
     'oneOf': [
         {
             'required': [
-                'ops-db',
                 'ssh',
                 'redis',
                 'redis-databases',
@@ -232,7 +231,6 @@ CONFIG_SCHEMA = {
         },
         {
             'required': [
-                'ops-db',
                 'ssh',
                 'sentinel',
                 'redis-databases',