[#noissue] Remove deprecated Charsets.java

[emeroad]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 36.90%. Comparing base (5598e76) to head (f2ba4e9).
Report is 2 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #11750      +/-   ##
============================================
- Coverage     36.90%   36.90%   -0.01%     
- Complexity    12401    12402       +1     
============================================
  Files          4104     4103       -1     
  Lines        100684   100680       -4     
  Branches      10538    10538              
============================================
- Hits          37155    37151       -4     
  Misses        60538    60538              
  Partials       2991     2991              

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