Remove redondant call to importable_name
The variable `class_name` is already defined at line 345, there is no need to recall `importable_name` after that in the same function, since `cls` doesn't change between the two calls.
@@ -417,7 +417,6 @@ class Pickler(object):
if has_class and not util.is_module(obj):
if self.unpicklable:
- class_name = util.importable_name(cls)
data[tags.OBJECT] = class_name
if has_getnewargs_ex:
