Remove WebSocket server implementation and related functionality

[nygrenh]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.62%. Comparing base (ae63528) to head (430a975).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1292      +/-   ##
==========================================
+ Coverage   65.87%   66.62%   +0.74%     
==========================================
  Files         144      143       -1     
  Lines        6101     5974     -127     
  Branches     1445     1411      -34     
==========================================
- Hits         4019     3980      -39     
+ Misses       1939     1856      -83     
+ Partials      143      138       -5     

Flag	Coverage Δ
backend	66.62% <ø> (+0.74%)	⬆️

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