python: Don't generate bindings for vir*Ref

They are only for use in implementing the bindings, so shouldn't be
exposed to regular API users.
Signed-off-by: NCole Robinson <crobinso@redhat.com>

python/generator.py

@@ -333,6 +333,16 @@ skip_function = (
     'virStreamSendAll',
     'virStreamRef',
     'virStreamFree',
+
+    # These have no use for bindings users.
+    "virConnectRef",
+    "virDomainRef",
+    "virInterfaceRef",
+    "virNetworkRef",
+    "virNodeDeviceRef",
+    "virSecretRef",
+    "virStoragePoolRef",
+    "virStorageVolRef",
 )