Cleanup dead code

[Youssef1313]

Related to #1285

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.82%. Comparing base (7c27fab) to head (9df49b9).

Additional details and impacted files

@@            Coverage Diff             @@
##           dev/v4    #5847      +/-   ##
==========================================
- Coverage   71.93%   67.82%   -4.12%     
==========================================
  Files         600      600              
  Lines       38703    36244    -2459     
==========================================
- Hits        27842    24581    -3261     
- Misses      10861    11663     +802     

Flag	Coverage Δ
Debug	67.82% <ø> (-4.12%)	⬇️
integration	67.82% <ø> (-4.64%)	⬇️
production	67.82% <ø> (-4.12%)	⬇️
unit	67.82% <ø> (-0.05%)	⬇️

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Files with missing lines	Coverage Δ
...ter.PlatformServices/Execution/TestAssemblyInfo.cs	49.35% <ø> (-38.39%)	⬇️
...dapter.PlatformServices/Execution/TestClassInfo.cs	58.33% <ø> (-27.14%)	⬇️
...estAdapter.PlatformServices/Execution/TypeCache.cs	67.55% <ø> (-24.64%)	⬇️

... and 53 files with indirect coverage changes

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