DOC: Remove vendored IPython.sphinext

[TomAugspurger]

No description provided.

[jreback]

love removing code!

assume this renders the same / better?
do we need to change our requirements in any way?

[codecov]

Codecov Report

Merging #18193 into master will decrease coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #18193      +/-   ##
==========================================
- Coverage   91.42%   91.38%   -0.05%     
==========================================
  Files         163      163              
  Lines       50064    50064              
==========================================
- Hits        45772    45751      -21     
- Misses       4292     4313      +21

Flag	Coverage Δ
#multiple	89.19% <ø> (-0.03%)	⬇️
#single	40.36% <ø> (-0.06%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	25% <0%> (-58.34%)	⬇️
pandas/plotting/_converter.py	63.38% <0%> (-1.82%)	⬇️
pandas/core/frame.py	97.8% <0%> (-0.1%)	⬇️

---

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[codecov]

Codecov Report

Merging #18193 into master will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #18193      +/-   ##
==========================================
- Coverage    91.4%   91.38%   -0.03%     
==========================================
  Files         163      163              
  Lines       50064    50064              
==========================================
- Hits        45763    45751      -12     
- Misses       4301     4313      +12

Flag	Coverage Δ
#multiple	89.19% <ø> (-0.03%)	⬇️
#single	40.36% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
pandas/plotting/_converter.py	63.38% <0%> (-1.82%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 17e0b13...902b75f. Read the comment docs.

[TomAugspurger]

Renders the same AFAICT. Apparently the @savefig puts files in a different place now, but not a big deal.

Dependencies should all be fine. We already include IPython in our doc build, and the updates I made to contributing last week include IPython.

[jorisvandenbossche]

Yes!