CI: Reverted changes related to 'jedi' warnings

[ShaharNaveh]

• closes CI: revert the warning change once IPython updates #31407
• tests added / passed
• passes black pandas
• passes git diff upstream/master -u -- "*.py" | flake8 --diff
• whatsnew entry

[charlesdong1991]

Hi, @MomIsBestFriend seems IPython hasn't fixed and released the new version, so I think this should wait?

[ShaharNaveh]

@charlesdong1991 Thank you for the quick response :)

It seemes that IPython did release a new upgrade (or maybe I had it outdated), anyway, I will re-base once in a while, until the problem is fixed, so we will know if it's fixed even if they fixed it but forgot to close the issue.

You are more than welcome to close this PR, but I haven't got warnings while trying it locally, but the problem is that I have python 3.8.1 so I can't know for sure.

[charlesdong1991]

ah, okay, this is the issue i posted on ipython (the link is also in the #31407 description), seems still open, that's why i thought this should wait
ipython/ipython#12102

[jbrockmendel]

is this still active?

[ShaharNaveh]

@jbrockmendel yes, I am updating this every week (ish)

[jbrockmendel]

@MomIsBestFriend can you close this until it becomes actionable?

[ShaharNaveh]

Sure, Will reopen (and ping) when this is mergeable (if that's even a word)