Remove reference to depreciated functions

Author: jessegrabowski

doc/library/misc/pkl_utils.rst

@@ -9,10 +9,6 @@
 
    from pytensor.misc.pkl_utils import *
 
-.. autofunction:: pytensor.misc.pkl_utils.dump
-
-.. autofunction:: pytensor.misc.pkl_utils.load
-
 .. autoclass:: pytensor.misc.pkl_utils.StripPickler
 
 .. seealso::

doc/tutorial/loading_and_saving.rst

@@ -145,7 +145,7 @@ might not have PyTensor installed, who are using a different Python version, or
 you are planning to save your model for a long time (in which case version
 mismatches might make it difficult to unpickle objects).
 
-See :func:`pytensor.misc.pkl_utils.dump` and :func:`pytensor.misc.pkl_utils.load`.
+See :meth:`pytensor.misc.pkl_utils.StripPickler.dump` and :meth:`pytensor.misc.pkl_utils.StripPickler.load`.
 
 
 Long-Term Serialization