Remove arguments from InheritanceQuerySetMixin._clone()

The `QuerySet._clone()` method has no arguments in either Django 3.2
or 4.1, so I'm assuming the arguments were necessary for a version
of Django that is no longer supported by `django-model-utils`.

Author: mthuurne

Diff for: model_utils/managers.py

@@ -89,7 +89,7 @@ def _chain(self, **kwargs):
         chained.__dict__.update(update)
         return chained
 
-    def _clone(self, klass=None, setup=False, **kwargs):
+    def _clone(self):
         qs = super()._clone()
         for name in ['subclasses', '_annotated']:
             if hasattr(self, name):