Resharding code cleanup

[ffuugoo]

Tracked in #4213.

Minor cleanups for resharding code.

All Submissions:

• Contributions should target the dev branch. Did you create your branch from dev?
• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

New Feature Submissions:

1. Does your submission pass tests?
2. Have you formatted your code locally using cargo +nightly fmt --all command prior to submission?
3. Have you checked your code using cargo clippy --all --all-features command?

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully ran tests with your changes locally?

[timvisee]

How about self.key() == key?

Suggested change

	self.peer_id == key.peer_id
	&& self.shard_id == key.shard_id
	&& self.shard_key == key.shard_key
	self.key() == key

[ffuugoo]

I don't like the extra clone. 😂