Remove unused class and methods

[snuyanzin]

No description provided.

[codecov-commenter]

Codecov Report

Merging #801 (baa93be) into main (96afe71) will increase coverage by 0.28%.
The diff coverage is n/a.

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@@             Coverage Diff              @@
##               main     #801      +/-   ##
============================================
+ Coverage     92.45%   92.74%   +0.28%     
- Complexity     2652     2654       +2     
============================================
  Files           286      286              
  Lines          5275     5264      -11     
  Branches        553      553              
============================================
+ Hits           4877     4882       +5     
+ Misses          255      241      -14     
+ Partials        143      141       -2     

Impacted Files	Coverage Δ
...main/java/net/datafaker/service/RegExpContext.java	57.89% <ø> (+10.06%)	⬆️
...ain/java/net/datafaker/transformations/Schema.java	100.00% <ø> (+58.33%)	⬆️

... and 4 files with indirect coverage changes

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