Rust: remove shipped feature flag #118

Job	Run time
Quality queries input (windows-latest, linked)	2m 47s
Quality queries input (macos-latest, nightly-latest)	1m 30s
Quality queries input (windows-latest, nightly-latest)	2m 57s
Quality queries input (ubuntu-latest, nightly-latest)	1m 26s
Quality queries input (macos-latest, linked)	1m 42s
Quality queries input (ubuntu-latest, linked)	1m 17s
	11m 39s

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