Minor: Remove redundant dependencies from `datafusion-functions/Cargo.toml` #24487

Job	Run time
build with wasm-pack	2m 15s
cargo check	9m 38s
cargo test (macos)	25m 3s
cargo test (win64)	43m 31s
cargo test (macos-aarch64)	13m 16s
Check cargo fmt	46s
Verify MSRV (Min Supported Rust Version)	7m 6s
Verify Vendored Code	54s
cargo test (amd64)	11m 12s
cargo test datafusion-cli (amd64)	3m 43s
clippy	6m 2s
cargo doc	3m 44s
cargo test doc (amd64)	12m 41s
cargo examples (amd64)	10m 25s
Run sqllogictest with Postgres runner	3m 15s
cargo test pyarrow (amd64)	2m 33s
verify benchmark results (amd64)	10m 54s
check configs.md is up-to-date	2m 35s
cargo test hash collisions (amd64)	10m 5s
check Cargo.toml formatting	2m 57s
	3h 2m 35s

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