docs: Drop deprecated 'props' from object-add

In commit 5024340745 "qapi/qom: Drop deprecated 'props' from
object-add" (v6.0.0), we also should update documents.

Signed-off-by: Lei Rao <lei.rao@intel.com>
Message-Id: <1637567387-28250-1-git-send-email-lei.rao@intel.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

docs/system/authz.rst

@@ -77,9 +77,7 @@ To create an instance of this driver via QMP:
      "arguments": {
        "qom-type": "authz-simple",
        "id": "authz0",
-       "props": {
-         "identity": "fred"
-       }
+       "identity": "fred"
      }
    }
 
@@ -110,15 +108,13 @@ To create an instance of this class via QMP:
      "arguments": {
        "qom-type": "authz-list",
        "id": "authz0",
-       "props": {
-         "rules": [
-            { "match": "fred", "policy": "allow", "format": "exact" },
-            { "match": "bob", "policy": "allow", "format": "exact" },
-            { "match": "danb", "policy": "deny", "format": "exact" },
-            { "match": "dan*", "policy": "allow", "format": "glob" }
-         ],
-         "policy": "deny"
-       }
+       "rules": [
+          { "match": "fred", "policy": "allow", "format": "exact" },
+          { "match": "bob", "policy": "allow", "format": "exact" },
+          { "match": "danb", "policy": "deny", "format": "exact" },
+          { "match": "dan*", "policy": "allow", "format": "glob" }
+       ],
+       "policy": "deny"
      }
    }
 
@@ -143,10 +139,8 @@ To create an instance of this class via QMP:
      "arguments": {
        "qom-type": "authz-list-file",
        "id": "authz0",
-       "props": {
-         "filename": "/etc/qemu/myvm-vnc.acl",
-         "refresh": true
-       }
+       "filename": "/etc/qemu/myvm-vnc.acl",
+       "refresh": true
      }
    }