CLN: General cleanup in `_libs/lib.pyx`
- [ ] closes #xxxx
- [ ] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

Um... why?  I try to be encouraging, but i dont see the point of any of this. > Um... why? I try to be encouraging,

You are doing a wonderful job :)

> but i dont see the point of any of this.

I'll remove the noise so you can see the actual changes.
 Much better, thanks.  I think parsers.pyx has an unnecessary import of `icom` too.

The lowest-hanging fruit for CLN PRs at this point is going through the tests and identifying giant tests that can be split into targeted tests. Looks good whenever green Thanks @MomIsBestFriend 