Remove unused isInverted prop from FlameGraphCanvas.

[mstange]

Small cleanup.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.45%. Comparing base (60f30d1) to head (361a5a9).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6116   +/-   ##
=======================================
  Coverage   83.45%   83.45%           
=======================================
  Files         341      341           
  Lines       36074    36074           
  Branches    10001    10001           
=======================================
  Hits        30107    30107           
  Misses       5539     5539           
  Partials      428      428           

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