Remove unused dependencies

[andrewdavidmackenzie]

Fixes #729

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 29%. Comparing base (c318ecc) to head (e20e67f).
Report is 2 commits behind head on master.

Additional details and impacted files

@@          Coverage Diff          @@
##           master   #736   +/-   ##
=====================================
  Coverage      29%    29%           
=====================================
  Files          46     46           
  Lines        5694   5694           
=====================================
  Hits         1622   1622           
  Misses       4072   4072           

Flag	Coverage Δ
unittests	29% <ø> (ø)

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