[ty] remove special handling for `Any()` in match class patterns (#23011)
## Summary
`Any` does not support `isinstance` checks and cannot be used in class
patterns. If the arm with `Any()` is hit, it will raise an error at
runtime:
```py
[nav] In [1]: from typing import Any
...:
...: X = Any
...:
...: def f(obj: object):
...: match obj:
...: case int():
...: ...
...: case X():
...: ...
[ins] In [2]: f("")
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
Cell In[2], line 1
----> 1 f("")
Cell In[1], line 9, in f(obj)
7 case int():
8 ...
----> 9 case X():
10 ...
# << snipped for brevity >>
TypeError: typing.Any cannot be used with isinstance()
```
Because this fails at runtime, we should ideally raise a diagnostic on
seeing `Any()` in a match pattern. That could potentially be done as
part of https://github.com/astral-sh/ty/issues/2592. But for now, this
PR only removes the special support that we have.
The special-case handling does not reduce any diagnostics on `jax` as of
today either.
## Test Plan
Removed tests :)
ruff
9e0189bb - [ty] remove special handling for `Any()` in match class patterns (#23011)
