Fix clippy warnings on nightly

[romac]

• Clippy warnings on latest nightly were failing the nightly-coverage job.

• Tested that the project still builds with Rust 1.72+.

• [ ] Referenced an issue explaining the need for the change

• [ ] Updated all relevant documentation in docs

• [ ] Updated all code comments where relevant

• [ ] Wrote tests

• [ ] Added entry in .changelog/

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 54.54545% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 60.0%. Comparing base (6160d0b) to head (bf7e417).

:exclamation: Current head bf7e417 differs from pull request most recent head 0d0ebeb. Consider uploading reports for the commit 0d0ebeb to get more accurate results

Files	Patch %	Lines
light-client/tests/model_based.rs	0.0%	1 Missing :warning:
tendermint/src/v0_34/abci/request.rs	0.0%	1 Missing :warning:
tendermint/src/v0_34/abci/response.rs	0.0%	1 Missing :warning:
tendermint/src/v0_37/abci/request.rs	0.0%	1 Missing :warning:
tendermint/src/v0_37/abci/response.rs	0.0%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1396 +/- ## ======================================= - Coverage 60.2% 60.0% -0.2% ======================================= Files 270 270 Lines 26072 26136 +64 ======================================= - Hits 15701 15694 -7 - Misses 10371 10442 +71 ```

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