REVERT caching in find_stack_level
addresses https://github.com/pandas-dev/pandas/pull/48023#issuecomment-1275912681
It undoes https://github.com/pandas-dev/pandas/pull/48023, but I did it manually instead of with `git revert` as there were too many conflicts to deal with > It undoes #48023, but I did it manually instead of with `git revert` as there were too many conflicts to deal with

I did this again with `git revert` and braved all the conflicts, to be safer. Also checked through the whole diff and it looks fine Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

```
git checkout 1.5.x
git pull
```

2. Cherry pick the first parent branch of the this PR on top of the older branch:
```
git cherry-pick -x -m1 0106c26529900bad0561efb9c9180f7f016365b0
```

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

```
git commit -am 'Backport PR #49053: REVERT caching in find_stack_level'
```

4. Push to a named branch:

```
git push YOURFORK 1.5.x:auto-backport-of-pr-49053-on-1.5.x
```

5. Create a PR against branch 1.5.x, I would have named this PR:

> "Backport PR #49053 on branch 1.5.x (REVERT caching in find_stack_level)"

And apply the correct labels and milestones.

Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon!

Remember to remove the `Still Needs Manual Backport` label once the PR gets merged.

If these instructions are inaccurate, feel free to [suggest an improvement](https://github.com/MeeseeksBox/MeeseeksDev).
                