Fix master: ci: Azure: remove pypy3

[blueyed]

It was enabled accidentally.

[blueyed]

Required to fix master.

[codecov]

Codecov Report

Merging #4885 into master will increase coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4885      +/-   ##
==========================================
+ Coverage   94.47%   94.54%   +0.07%     
==========================================
  Files         113      113              
  Lines       25173    25173              
  Branches     2499     2499              
==========================================
+ Hits        23782    23800      +18     
+ Misses       1060     1047      -13     
+ Partials      331      326       -5

Impacted Files	Coverage Δ
src/_pytest/capture.py	94.15% <0%> (+0.44%)	⬆️
src/_pytest/terminal.py	91.74% <0%> (+2.64%)	⬆️

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[blueyed]

Sorry, for breaking it in the first place, and for disabling the include-admins-override temporarily to merge this myself without approval.
But having master broken is quite bad.

[nicoddemus]

No worries