Clippy fixes

[barafael]

• [x] Check that you've added documentation to any new methods
• [ ] Rebase from master if you're not already up to date
• [x] Add or modify an example if there are changes to the public API
• [x] Add a CHANGELOG.md entry in the Unreleased section under the appropriate heading (Added, Fixed, Changed, etc)
• [x] Run rustfmt on the project with cargo fmt --all - CI will not pass without this step
• [ ] Check that your branch is up to date with master and that CI is passing once the PR is opened

PR description

Just noticed the project is set to deny_warnings but there are clippy warnings. Let me know what you think!