Removed old JS frontend

[tacruc]

Blocked by #723

@eneiluj did I miss anything?

[tacruc]

@eneiluj When you have time could you check if I missed something?

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (master@c56e6db). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #724   +/-   ##
=========================================
  Coverage          ?   46.51%           
  Complexity        ?     1114           
=========================================
  Files             ?       42           
  Lines             ?     3429           
  Branches          ?        0           
=========================================
  Hits              ?     1595           
  Misses            ?     1834           
  Partials          ?        0           

Flag	Coverage Δ
unittests	46.51% <0.00%> (?)

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