CLN: Fix abc imports

[alimcmaster1]

invgrep/Github actions exit status doesn't seem to be working correctly.

Currently on master we get these errors in the code_checks stage:
https://github.com/pandas-dev/pandas/pull/30452/checks#step:4:7

As per discussion here:
#30370 (comment)

[WillAyd]

lgtm ping on green

If you have interest in dissecting invgrep later would also be welcome

[alimcmaster1]

lgtm ping on green

If you have interest in dissecting invgrep later would also be welcome

Aha I think i've found the cause - see #30457

[alimcmaster1]

Code checks now runs without error for non standard imports

Run ci/code_checks.sh patterns
Check for non-standard imports
Check for non-standard imports DONE

green cc. @WillAyd

[mroeschke]

Thanks for the quick turnaround @alimcmaster1!