comment out the downloadNecessaryHLS code

[Leslie-Wong-H]

Fix #197

[codecov]

Codecov Report

Merging #198 (f81226a) into main (70e5143) will decrease coverage by 2.40%.
Report is 10 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #198      +/-   ##
==========================================
- Coverage   75.00%   72.60%   -2.40%     
==========================================
  Files          12       12              
  Lines         436      387      -49     
  Branches       91       84       -7     
==========================================
- Hits          327      281      -46     
+ Misses        104      101       -3     
  Partials        5        5              

Flag	Coverage Δ
unittests	72.60% <ø> (-2.40%)	⬇️

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Files Changed	Coverage Δ
src/lib/generate-video-preview.js	83.33% <ø> (-9.40%)	⬇️