Cleanup tests and use LFS properly

[JimBobSquarePants]

Prerequisites

• I have written a descriptive pull-request title
• I have verified that there are no overlapping pull-requests open
• I have verified that I am following matches the existing coding patterns and practice as demonstrated in the repository. These follow strict Stylecop rules 👮.
• I have provided test coverage for my change (where applicable)

Description

Cleans up tests, remove samples dumping ground.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82%. Comparing base (30eeab6) to head (17de111).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #515   +/-   ##
=====================================
  Coverage     82%     82%           
=====================================
  Files        305     305           
  Lines      21530   21530           
  Branches    3164    3164           
=====================================
  Hits       17817   17817           
  Misses      2900    2900           
  Partials     813     813           

Flag	Coverage Δ
unittests	82% <ø> (ø)

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