Remove unused config options

In c12eebd4c6 we missed that there are
another set of config option that become unused now. So this is a follow
up patch to remove those as well.

Change-Id: Ie00805b5f72b118db134aeb8399ef4c72f434966

doc/source/admin/metadata-service.rst

@@ -70,8 +70,6 @@ Configuration
 The :program:`nova-api` application accepts the following metadata
 service-related options:
 
-- :oslo.config:option:`enabled_apis`
-- :oslo.config:option:`enabled_ssl_apis`
 - :oslo.config:option:`neutron.service_metadata_proxy`
 - :oslo.config:option:`neutron.metadata_proxy_shared_secret`
 - :oslo.config:option:`api.metadata_cache_expiration`
@@ -90,13 +88,6 @@ following to a :file:`nova-api.conf` file:
 
 .. code-block:: ini
 
-    [DEFAULT]
-    enabled_apis = osapi_compute,metadata
-    enabled_ssl_apis =
-    metadata_listen = 0.0.0.0
-    metadata_listen_port = 0
-    metadata_workers = 4
-
     [neutron]
     service_metadata_proxy = True
 
@@ -136,11 +127,6 @@ file:
 
 .. code-block:: ini
 
-    [DEFAULT]
-    metadata_listen = 0.0.0.0
-    metadata_listen_port = 0
-    metadata_workers = 4
-
     [neutron]
     service_metadata_proxy = True