Fb optic 1542/remove a buch of stale feature flags

[luarmr]

WIP

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 76.95%. Comparing base (e0e91fd) to head (c37104c).
Report is 30 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #6931   +/-   ##
========================================
  Coverage    76.94%   76.95%           
========================================
  Files          175      175           
  Lines        14144    14144           
========================================
+ Hits         10883    10884    +1     
+ Misses        3261     3260    -1     

Flag	Coverage Δ
pytests	76.95% <ø> (+<0.01%)	⬆️

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