bpo-45711: Remove type and traceback from exc_info

[iritkatriel]

https://bugs.python.org/issue45711

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @iritkatriel for commit 9b04160 🤖

If you want to schedule another build, you need to add the ":hammer: test-with-buildbots" label again.

[markshannon]

Is this necessary now?
I don't see why we would ever want to increase it, and I don't see how we could ever decrease it.

[iritkatriel]

The name is probably weird now, but I think it helps readability to have a macro. If we remove this we should find another way to make the code (particularly in compile.c) clear about where exceptions are showing up. Figuring out where to use this macro was the hardest part of making this change (because when you get it wrong it just segfaults before you finish make regen-all).

[iritkatriel]

On second thought there is no point in a macro for this unless we all agree on some kind of convention because it probably won't be updated correctly when people make changes. So I'll remove it.

[markshannon]

This is great. 🍾

Removes code, should make any exception handling code faster and reduces stack consumption; the perfect combination.
A couple of very minor quibbles, otherwise looks really good.

[iritkatriel]

The windows test failure is unrelated

File "D:\a\cpython\cpython\Lib\test\support_init_.py", line 197, in _force_run
1232
return func(*args)
1233
^^^^^^^^^^^
1234
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'D:\a\cpython\cpython\build\test_python_4272�\test_python_worker_516�'

[markshannon]

Excellent.