Fixed Aero Heat Sink Appearing in Parts Store Multiplie Times

[IllianiBird]

• Removed duplicated calls to add AeroHeatSink objects to the parts list.

Fix #6302

Dev Notes

So this bug has been shuffling about since 2017, it seems. Basically, we were adding normal Aero Heat Sinks twice to the Parts Store. Whoops! Now we're not. #profit

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 11.27%. Comparing base (dbec8a9) to head (9dbfb66).
Report is 12 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6519      +/-   ##
============================================
- Coverage     11.28%   11.27%   -0.01%     
+ Complexity     6323     6318       -5     
============================================
  Files          1080     1080              
  Lines        137528   137525       -3     
  Branches      21295    21295              
============================================
- Hits          15516    15505      -11     
- Misses       120463   120466       +3     
- Partials       1549     1554       +5     

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