Use default Aesara RandomStream for VI

Author: ricardoV94

pymc/aesaraf.py

@@ -46,10 +46,10 @@
 )
 from aesara.graph.fg import FunctionGraph
 from aesara.graph.op import Op
-from aesara.sandbox.rng_mrg import MRG_RandomStream as RandomStream
 from aesara.scalar.basic import Cast
 from aesara.tensor.basic import _as_tensor_variable
 from aesara.tensor.elemwise import Elemwise
+from aesara.tensor.random import RandomStream
 from aesara.tensor.random.op import RandomVariable
 from aesara.tensor.random.var import (
     RandomGeneratorSharedVariable,