chore: remove swig depency from tests

[nijel]

It seems no longer needed.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.95%. Comparing base (e6ea908) to head (0f052b8).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1492   +/-   ##
=======================================
  Coverage   78.95%   78.95%           
=======================================
  Files         352      352           
  Lines       11467    11467           
  Branches      527      527           
=======================================
  Hits         9054     9054           
  Misses       2233     2233           
  Partials      180      180           

Flag	Coverage Δ
unittests	78.95% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.