Remove unnecessary cloning of NoneConst variable

Author: rlouf

aesara/tensor/random/basic.py

@@ -1792,7 +1792,7 @@ def __call__(self, a, size=None, replace=True, p=None, **kwargs):
             a = aesara.tensor.arange(a)
 
         if p is None:
-            p = aesara.tensor.type_other.NoneConst.clone()
+            p = aesara.tensor.type_other.NoneConst
 
         if isinstance(replace, bool):
             replace = aesara.tensor.constant(np.array(replace))