Rust: remove shipped feature flag #411

Job	Run time
Quality queries input (windows-latest, linked)	3m 32s
Quality queries input (ubuntu-latest, linked)	1m 13s
Quality queries input (macos-latest, linked)	1m 26s
Quality queries input (ubuntu-latest, nightly-latest)	1m 7s
Quality queries input (macos-latest, nightly-latest)	1m 29s
Quality queries input (windows-latest, nightly-latest)	2m 52s
	11m 39s

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