remove unused declaration

[sylvestre]

No description provided.

[sylvestre]

found by https://github.com/Boshen/cargo-shear

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.00%. Comparing base (316b807) to head (0fcbb86).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2577   +/-   ##
=======================================
  Coverage   72.00%   72.00%           
=======================================
  Files          65       65           
  Lines       36896    36896           
=======================================
  Hits        26566    26566           
  Misses      10330    10330           

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