Remove the fake benchmarking slowdown #170

Job	Run time
Check cargo fmt	39s
cargo check	3m 22s
build with wasm-pack	2m 14s
cargo test (macos)	21m 41s
cargo test (macos-aarch64)	12m 13s
Verify Vendored Code	59s
cargo test (win64)	41m 8s
Verify MSRV (Min Supported Rust Version)	6m 44s
Run sqllogictest with Postgres runner	3m 10s
cargo test pyarrow (amd64)	2m 36s
check Cargo.toml formatting	3m 9s
clippy	6m 12s
cargo test hash collisions (amd64)	9m 55s
cargo doc	5m 37s
cargo test (amd64)	10m 42s
cargo test datafusion-cli (amd64)	3m 31s
cargo test doc (amd64)	12m 53s
cargo examples (amd64)	10m 50s
verify benchmark results (amd64)	10m 31s
check configs.md is up-to-date	2m 40s
	2h 50m 46s

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