Rust

Remove input_schema #544

Job	Run time
cargo check	3m 39s
cargo test (win64)	11m 30s
build with wasm-pack	2m 24s
Check cargo fmt	44s
cargo test (mac)	7m 25s
Verify MSRV	9m 46s
Verify Vendored Code	1m 7s
Run sqllogictest with Postgres runner	0s
verify benchmark results (amd64)	0s
cargo examples (amd64)	0s
cargo doc	0s
cargo test doc (amd64)	0s
clippy	0s
cargo test hash collisions (amd64)	0s
cargo test (amd64)	0s
cargo test datafusion-cli (amd64)	0s
cargo test pyarrow (amd64)	0s
check Cargo.toml formatting	0s
check configs.md is up-to-date	0s
	36m 35s

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