chore: remove legacy prefixes

[mister-ben]

Description

Removes prefexes that aren't needed for supported versions

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Change has been verified in an actual browser (Chrome, Firefox, IE)
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

[codecov]

Codecov Report

Merging #8276 (4c252fe) into main (f1558c6) will increase coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #8276      +/-   ##
==========================================
+ Coverage   82.36%   82.38%   +0.02%     
==========================================
  Files         112      112              
  Lines        7483     7481       -2     
  Branches     1804     1803       -1     
==========================================
  Hits         6163     6163              
+ Misses       1320     1318       -2     

Impacted Files	Coverage Δ
src/js/fullscreen-api.js	100.00% <ø> (ø)
src/js/player.js	90.39% <ø> (+0.11%)	⬆️

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