Merge bitcoindevkit/bdk#1530: chore: fix clippy lints

8bf8c7d080194872188e1ab7a6f14c06b121e371 chore: fix clippy lints (Jose Storopoli)

Pull request description:

  ### Description

  Fix some clippy CI lints

  ### Notes to the reviewers

  More caught by the Nix CI in #1320.

  ### Changelog notice

  chore: clippy lints

  ### Checklists

  #### All Submissions:

  * [x] I've signed all my commits
  * [x] I followed the [contribution guidelines](https://github.com/bitcoindevkit/bdk/blob/master/CONTRIBUTING.md)
  * [x] I ran `cargo fmt` and `cargo clippy` before committing

  #### New Features:

  * [ ] I've added tests for the new feature
  * [ ] I've added docs for the new feature

  #### Bugfixes:

  * [ ] This pull request breaks the existing API
  * [ ] I've added tests to reproduce the issue which are now passing
  * [ ] I'm linking the issue being fixed by this PR

ACKs for top commit:
  notmandatory:
    ACK 8bf8c7d080194872188e1ab7a6f14c06b121e371

Tree-SHA512: 6b53cb739e506d79106a2f42aa2b8fa28ef226543fbbf100225f10ed82257f6fd0218f09c0f1291803fbc9c1c88e32ba1c7e02fe3f601ccc9dc5be8a6efea6e1