TST: clean warnings

[jreback]

No description provided.

[codecov]

Codecov Report

Merging #18012 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #18012      +/-   ##
==========================================
- Coverage   91.24%   91.23%   -0.02%     
==========================================
  Files         163      163              
  Lines       50168    50176       +8     
==========================================
  Hits        45777    45777              
- Misses       4391     4399       +8

Flag	Coverage Δ
#multiple	89.04% <ø> (ø)	⬆️
#single	40.28% <ø> (-0.06%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	25% <0%> (-58.34%)	⬇️
pandas/core/frame.py	97.75% <0%> (-0.1%)	⬇️
pandas/core/dtypes/concat.py	99.14% <0%> (+0.01%)	⬆️
pandas/core/indexes/numeric.py	97.27% <0%> (+0.03%)	⬆️
pandas/core/indexes/datetimes.py	95.5% <0%> (+0.09%)	⬆️

---

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[codecov]

Codecov Report

Merging #18012 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #18012   +/-   ##
=======================================
  Coverage   91.23%   91.23%           
=======================================
  Files         163      163           
  Lines       50176    50176           
=======================================
  Hits        45777    45777           
  Misses       4399     4399

Flag	Coverage Δ
#multiple	89.04% <ø> (ø)	⬆️
#single	40.28% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
pandas/core/categorical.py	95.75% <ø> (ø)	⬆️

---

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 1977362...31990b6. Read the comment docs.