Remove helanal

[lilyminium]

Fixes #

Changes made in this Pull Request:

• remove old helanal module

PR Checklist

• Tests?
• Docs?
• CHANGELOG updated?
• Issue raised/referenced?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.05%. Comparing base (2c5e385) to head (8ac7d01).
⚠️ Report is 1454 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2929      +/-   ##
===========================================
+ Coverage    93.02%   93.05%   +0.03%     
===========================================
  Files          187      186       -1     
  Lines        24962    24613     -349     
  Branches      3261     3187      -74     
===========================================
- Hits         23220    22904     -316     
+ Misses        1694     1661      -33     
  Partials        48       48              

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[IAlibay]

Thanks for doing this :)

Can you also add a change under the changelog's changes?

[IAlibay]

@lilyminium

/home/travis/build/MDAnalysis/mdanalysis/package/MDAnalysis/analysis/helix_analysis.py:docstring of MDAnalysis.analysis.helix_analysis:10:citation not found: Bansal2000

I guess the citation needs to be ported over.

There's also some flaky lib_dcd failure on azure, it's not the first time I've seen it, not sure what's going on there.

[lilyminium]

Thanks for looking at this @IAlibay!