chore: Drop Array.includes polyfull

[arkirchner]

Browser support for Array.includes is widely available and does not need to be patched.

All green for all browsers.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/includes#browser_compatibility

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.05%. Comparing base (393091c) to head (cc3be2f).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3022   +/-   ##
=======================================
  Coverage   70.05%   70.05%           
=======================================
  Files         215      215           
  Lines        6850     6850           
=======================================
  Hits         4799     4799           
  Misses       2051     2051           

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