Drop useless slot inheritance in EmptyType and UniverseType

diff --git a/linpy/polyhedra.py b/linpy/polyhedra.py
index 9fdf6e792ccdbb1145dce7e2d1ca712d75f7deee..31b64b14d2fe1525fa4b7e7df7fc13025fe0290e 100644 (file)
--- a/linpy/polyhedra.py
+++ b/linpy/polyhedra.py
@@ -306,8 +306,6 @@ class EmptyType(Polyhedron):
     The empty polyhedron, whose set of constraints is not satisfiable.
     """
 
-    __slots__ = Polyhedron.__slots__
-
     def __new__(cls):
         self = object().__new__(cls)
         self._equalities = (Rational(1),)
@@ -336,8 +334,6 @@ class UniverseType(Polyhedron):
     i.e. is empty.
     """
 
-    __slots__ = Polyhedron.__slots__
-
     def __new__(cls):
         self = object().__new__(cls)
         self._equalities = ()