GitHub repo maintenance

[imnasnainaec]

A few small repo maintenance changes, including deleting a script in package.json related to TeamCity, which we don't use anymore.

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This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.27%. Comparing base (6cb624c) to head (7720f5e).
Report is 31 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3665   +/-   ##
=======================================
  Coverage   74.27%   74.27%           
=======================================
  Files         285      285           
  Lines       11116    11116           
  Branches     1370     1370           
=======================================
  Hits         8256     8256           
  Misses       2467     2467           
  Partials      393      393           

Flag	Coverage Δ
backend	83.89% <ø> (ø)
frontend	65.89% <ø> (ø)

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[andracc]

Reviewed 3 of 3 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)