Rust

Add comment on removing build script. #44

Job	Run time
Rust	27s
Miri	39s
Rust (1.60.0)	1m 10s
Rust (1.63.0)	1m 8s
Rust (ubuntu-latest, x86_64, stable)	33s
Rust (1.66.0)	1m 8s
Rust (ubuntu-latest, x86_64, beta)	19s
Rust (1.69.0)	18s
Rust (ubuntu-latest, x86_64, nightly)	19s
Rust (ubuntu-latest, x86_64, 1.70.0)	29s
Rust (1.70.0)	25s
Rust (ubuntu-latest, i686, stable)	6s
Rust (ubuntu-latest, i686, beta)	14s
Rust (ubuntu-latest, i686, nightly)	27s
Rust (ubuntu-latest, i686, 1.70.0)	18s
Rust (ubuntu-latest, aarch64, stable)	8s
Rust (ubuntu-latest, aarch64, beta)	14s
Rust (ubuntu-latest, aarch64, nightly)	16s
Rust (ubuntu-latest, aarch64, 1.70.0)	14s
Rust (windows-latest, x86_64, stable)	1m 46s
Rust (windows-latest, x86_64, beta)	46s
Rust (windows-latest, x86_64, nightly)	50s
Rust (windows-latest, x86_64, 1.70.0)	56s
Rust (windows-latest, i686, stable)	1m 37s
Rust (windows-latest, i686, beta)	36s
Rust (windows-latest, i686, nightly)	38s
Rust (windows-latest, i686, 1.70.0)	30s
Rust (windows-latest, aarch64, stable)	1m 3s
Rust (windows-latest, aarch64, beta)	35s
Rust (windows-latest, aarch64, nightly)	35s
Rust (windows-latest, aarch64, 1.70.0)	37s
	19m 21s

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