BUG: remove tab completion for deprecated functions

[jreback]

closes #17674

[jreback]

@TomAugspurger I think this works, pls give a check.

[TomAugspurger]

Tried it out, looks good.

[codecov]

Codecov Report

Merging #17683 into master will decrease coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #17683      +/-   ##
==========================================
- Coverage   91.25%   91.22%   -0.04%     
==========================================
  Files         163      163              
  Lines       49736    49737       +1     
==========================================
- Hits        45389    45372      -17     
- Misses       4347     4365      +18

Flag	Coverage Δ
#multiple	89.01% <100%> (-0.02%)	⬇️
#single	40.34% <83.33%> (-0.06%)	⬇️

Impacted Files	Coverage Δ
pandas/core/categorical.py	95.69% <100%> (+0.41%)	⬆️
pandas/core/accessor.py	93.75% <100%> (+0.09%)	⬆️
pandas/core/generic.py	92.07% <100%> (ø)	⬆️
pandas/core/series.py	94.93% <100%> (ø)	⬆️
pandas/core/frame.py	97.73% <100%> (-0.1%)	⬇️
pandas/io/gbq.py	25% <0%> (-58.34%)	⬇️
pandas/plotting/_converter.py	63.38% <0%> (-1.82%)	⬇️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 7e87385...3946c83. Read the comment docs.

[codecov]

Codecov Report

Merging #17683 into master will decrease coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #17683      +/-   ##
==========================================
- Coverage   91.25%   91.22%   -0.04%     
==========================================
  Files         163      163              
  Lines       49736    49737       +1     
==========================================
- Hits        45389    45372      -17     
- Misses       4347     4365      +18

Flag	Coverage Δ
#multiple	89.01% <100%> (-0.02%)	⬇️
#single	40.34% <83.33%> (-0.06%)	⬇️

Impacted Files	Coverage Δ
pandas/core/generic.py	92.07% <100%> (ø)	⬆️
pandas/core/accessor.py	93.75% <100%> (+0.09%)	⬆️
pandas/core/frame.py	97.73% <100%> (-0.1%)	⬇️
pandas/core/categorical.py	95.69% <100%> (+0.41%)	⬆️
pandas/core/series.py	94.93% <100%> (ø)	⬆️
pandas/io/gbq.py	25% <0%> (-58.34%)	⬇️
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 7e87385...3946c83. Read the comment docs.