fixup of python recipe

[petrelharp]

A lot of that wasn't necessary any more!

[petrelharp]

(btw, why not have symlinks between the two places recipes are, to avoid having to sync those two sets of files?)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.82%. Comparing base (36d89fe) to head (d6def05).

Additional details and impacted files

@@                  Coverage Diff                   @@
##           efficient_metadata     #659      +/-   ##
======================================================
- Coverage               76.88%   76.82%   -0.07%     
======================================================
  Files                     117      117              
  Lines                   78701    78701              
  Branches                14286    14283       -3     
======================================================
- Hits                    60507    60459      -48     
- Misses                  18194    18242      +48     

see 10 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[bhaller]

(btw, why not have symlinks between the two places recipes are, to avoid having to sync those two sets of files?)

Because the trouble involved in copying files over is smaller than the trouble involved in setting up the symlinks and testing that they check in to GitHub properly, that they work on all target platforms (e.g., Windows), etc.? :->