remove `internal_config` feature

[wyfo]

Resolves #1655 Based on #1938

[github-actions[bot]]

PR missing one of the required labels: {'internal', 'bug', 'enhancement', 'new feature', 'documentation', 'breaking-change', 'dependencies'}

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 71.01%. Comparing base (287d5ac) to head (57c72b1). Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1939      +/-   ##
==========================================
- Coverage   71.08%   71.01%   -0.07%     
==========================================
  Files         367      367              
  Lines       61897    61886      -11     
==========================================
- Hits        43997    43946      -51     
- Misses      17900    17940      +40     

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