Update on "Remove old TORCH_VERSION variables"

**Summary:** As a follow-up to #2719,
which deprecated these variables in 0.13.0, we remove them now in
the next release 0.15.0.

**Test Plan:** CI

[ghstack-poisoned]

Author: andrewor14

torchao/utils.py

@@ -11,7 +11,7 @@
 from functools import reduce
 from importlib.metadata import version
 from math import gcd
-from typing import Any, Callable, Optional, Type
+from typing import Any, Callable, Optional
 
 import torch
 import torch.nn.utils.parametrize as parametrize