chore: Fix clippy warnings for Rust v1.60

[thanethomson]

No description provided.

[codecov-commenter]

Codecov Report

Merging #1118 (606afdc) into master (65b916b) will decrease coverage by 0.0%.
The diff coverage is 100.0%.

@@           Coverage Diff            @@
##           master   #1118     +/-   ##
========================================
- Coverage    64.8%   64.8%   -0.1%     
========================================
  Files         240     240             
  Lines       20822   20822             
========================================
- Hits        13496   13493      -3     
- Misses       7326    7329      +3     

Impacted Files	Coverage Δ
tendermint/src/validator.rs	73.6% <100.0%> (ø)
testgen/src/header.rs	84.4% <0.0%> (-0.6%)	⬇️
light-client-verifier/src/types.rs	38.5% <0.0%> (-0.3%)	⬇️
abci/src/server.rs	9.2% <0.0%> (-0.2%)	⬇️
tendermint/src/node.rs	63.8% <0.0%> (-0.2%)	⬇️
testgen/src/vote.rs	84.8% <0.0%> (ø)
testgen/src/validator.rs	87.5% <0.0%> (+0.7%)	⬆️

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