fix: Unused variable, import, function or class

[afc163]

close https://github.com/react-component/menu/security/code-scanning/4
close https://github.com/react-component/menu/security/code-scanning/2

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (35a956d) 99.58% compared to head (c9b0d34) 99.58%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #685   +/-   ##
=======================================
  Coverage   99.58%   99.58%           
=======================================
  Files          27       27           
  Lines         721      721           
  Branches      198      198           
=======================================
  Hits          718      718           
  Misses          3        3           

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