[llvm] [profcheck] Remove the expected failed test cases. (PR #170787)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 approved this pull request.

It would be good to mention in the title where the failures were fixed.

Something like
```
[profcheck] Remove test cases fixed in #168161 from xfail list
```

I think works a lot better. Even better would have been updating the xfail list within the PR that fixed the test cases.

https://github.com/llvm/llvm-project/pull/170787