Rust

Fix clippy #605

Job	Run time
Check cargo fmt	39s
cargo check	2m 13s
build with wasm-pack	1m 51s
cargo test (mac)	14m 55s
Verify MSRV	6m 28s
Verify Vendored Code	44s
cargo test (win64)	3h 21m 16s
cargo test doc (amd64)	9m 6s
verify benchmark results (amd64)	9m 44s
check configs.md is up-to-date	2m 18s
clippy	2m 13s
check Cargo.toml formatting	1m 21s
cargo test hash collisions (amd64)	8m 41s
cargo doc	3m 1s
cargo test (amd64)	9m 4s
cargo test datafusion-cli (amd64)	2m 54s
cargo examples (amd64)	6m 16s
Run sqllogictest with Postgres runner	2m 59s
cargo test pyarrow (amd64)	2m 15s
	4h 47m 58s

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