Issue #13575: there is only one class type.
diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index abc9ffc..c8d1e90 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -474,7 +474,7 @@
     flush_std_files();
 
     /* Collect final garbage.  This disposes of cycles created by
-     * new-style class definitions, for example.
+     * class definitions, for example.
      * XXX This is disabled because it caused too many problems.  If
      * XXX a __del__ or weakref callback triggers here, Python code has
      * XXX a hard time running, because even the sys module has been
@@ -1348,11 +1348,6 @@
     _Py_IDENTIFIER(offset);
     _Py_IDENTIFIER(text);
 
-    /* old style errors */
-    if (PyTuple_Check(err))
-        return PyArg_ParseTuple(err, "O(ziiz)", message, filename,
-                                lineno, offset, text);
-
     /* new style errors.  `err' is an instance */
 
     if (! (v = _PyObject_GetAttrId(err, &PyId_msg)))