Remove unnecessary use<...> clauses after Rust 2024 edition upgrade

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[Copilot]

Pull Request Overview

This PR modernizes the codebase following the Rust 2024 edition upgrade by removing unnecessary use<...> clauses and simplifying function signatures. The changes eliminate redundant lifetime parameters and formatting that are no longer required in the newer Rust edition.

• Remove use<...> bounds from impl Iterator return types that are now inferred automatically
• Simplify lifetime parameters by removing unnecessary explicit lifetimes
• Consolidate multi-line function signatures into single lines for better readability

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/tree.rs	Simplifies function signature formatting for common_prefixes_owned
src/map.rs	Removes use<...> clauses from iterator methods and simplifies lifetime parameters in iter_prefix methods

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