chore(encoding): remove reductant JSDoc in base64 stream

[BlackAsLight]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.67%. Comparing base (64690f9) to head (fcfc173).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6478   +/-   ##
=======================================
  Coverage   95.67%   95.67%           
=======================================
  Files         575      575           
  Lines       43192    43192           
  Branches     6475     6475           
=======================================
+ Hits        41323    41324    +1     
+ Misses       1830     1828    -2     
- Partials       39       40    +1     

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