Fix Ping endpoint documentation

docs/sources/api/registry_api.rst

@@ -463,7 +463,7 @@ Ancestry
 2.4 Status
 ----------
 
-.. http:get /v1/_ping
+.. http:get:: /v1/_ping
 
     Check status of the registry. This endpoint is also used to determine if
     the registry supports SSL.
@@ -479,9 +479,6 @@ Ancestry
 
         ""
 
-    :parameter namespace: namespace for the repo
-    :parameter repository: name for the repo
-
     **Example Response**:
 
     .. sourcecode:: http