CLN remove unnecessary noqas from pandas/core
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
LGTM, nice cleanup thanks @MarcoGorelli 

ideally if we have a script to see these (maybe a grep is enough), and even better to have a code-check, but not sure how heavy handed that is. > LGTM, nice cleanup

Credit to yet another asottile tool https://github.com/asottile/yesqa