chore: remove unused using statements

[TimothyMakkison]

Remove unused using statements. Haven't done this to all the projects as it would cause the tests to fail.

See #1596 & #1602

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a79471d) 85.40% compared to head (4bdbec7) 85.40%.
Report is 2 commits behind head on main.

❗ Current head 4bdbec7 differs from pull request most recent head 22922d9. Consider uploading reports for the commit 22922d9 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1618   +/-   ##
=======================================
  Coverage   85.40%   85.40%           
=======================================
  Files          33       33           
  Lines        1685     1685           
  Branches      295      295           
=======================================
  Hits         1439     1439           
  Misses        167      167           
  Partials       79       79           

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