remove deprecated module scan.opt

pytensor/scan/opt.py

-import warnings
-
-
-warnings.warn(
-    "The module `pytensor.scan.opt` is deprecated; use `pytensor.scan.rewriting` instead.",
-    DeprecationWarning,
-    stacklevel=2,
-)
-
-from pytensor.scan.rewriting import *  # noqa: F401 E402 F403