Remove Deprecated Azure CI Step

[WillAyd]

Found this while investigating #26345 may or may not be related but figured worth a separate PR in either case

[codecov]

Codecov Report

Merging #26384 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #26384      +/-   ##
==========================================
- Coverage   91.68%   91.67%   -0.01%     
==========================================
  Files         174      174              
  Lines       50704    50704              
==========================================
- Hits        46488    46484       -4     
- Misses       4216     4220       +4

Flag	Coverage Δ
#multiple	90.18% <ø> (ø)	⬆️
#single	41.18% <ø> (-0.15%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	78.94% <0%> (-10.53%)	⬇️
pandas/core/frame.py	97.01% <0%> (-0.12%)	⬇️

---

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[codecov]

Codecov Report

Merging #26384 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #26384      +/-   ##
==========================================
- Coverage   91.69%   91.68%   -0.01%     
==========================================
  Files         174      174              
  Lines       50749    50743       -6     
==========================================
- Hits        46534    46524      -10     
- Misses       4215     4219       +4

Flag	Coverage Δ
#multiple	90.19% <ø> (-0.01%)	⬇️
#single	41.19% <ø> (-0.13%)	⬇️

Impacted Files	Coverage Δ
pandas/io/gbq.py	78.94% <0%> (-10.53%)	⬇️
pandas/core/frame.py	97.02% <0%> (-0.12%)	⬇️
pandas/core/groupby/generic.py	88.93% <0%> (-0.08%)	⬇️
pandas/core/groupby/groupby.py	97.23% <0%> (-0.01%)	⬇️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[datapythonista]

@WillAyd looks like this step is required to install conda, right?

[WillAyd]

@datapythonista not entirely sure. The build logs show this task and deprecated and it appears to be documented as such on the Azure side:

https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/package/conda-environment?view=azure-devops#yaml-snippet

I think the preference is to use a task that just exposes conda via the system path:

https://docs.microsoft.com/en-us/azure/devops/pipelines/languages/anaconda?view=azure-devops&tabs=ubuntu-16-04#add-conda-to-your-system-path

[datapythonista]

That sounds good to me. I saw that the CI was failing because of deleting the step, but if we can just set an environment variable that sounds better.

[WillAyd]

FWIW here's the issue on the Azure side of things:

microsoft/azure-pipelines-tasks#9573

[datapythonista]

lgtm, nice clean up

logs mention about updating conda (i.e. conda update -n base -c defaults conda), may be we could add that, but in any case, happy with the PR

[jreback]

thanks @WillAyd