Removed ZMQ toy server used for initial experimentation

Created by: stefanoborini

We don't need this toy server anymore. It is now integrated in the UI.

Created by: codecov[bot]

Codecov Report

Merging #103 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #103   +/-   ##
=======================================
  Coverage   96.41%   96.41%           
=======================================
  Files          39       39           
  Lines         697      697           
  Branches       49       49           
=======================================
  Hits          672      672           
  Misses         21       21           
  Partials        4        4

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