used Set import removed

owlapy/class_expression/restriction.py

@@ -1,7 +1,7 @@
 """OWL Restrictions"""
 from abc import ABCMeta, abstractmethod
 from ..meta_classes import HasFiller, HasCardinality, HasOperands
-from typing import TypeVar, Generic, Final, Sequence, Union, Iterable, Set
+from typing import TypeVar, Generic, Final, Sequence, Union, Iterable
 from .nary_boolean_expression import OWLObjectIntersectionOf, OWLObjectUnionOf
 from .class_expression import OWLAnonymousClassExpression, OWLClassExpression
 from ..owl_property import OWLPropertyExpression, OWLObjectPropertyExpression, OWLDataPropertyExpression