Rust: remove shipped feature flag #412

Job	Run time
Quality queries input (macos-latest, linked)	1m 20s
Quality queries input (windows-latest, nightly-latest)	3m 5s
Quality queries input (ubuntu-latest, linked)	1m 10s
Quality queries input (windows-latest, linked)	4m 46s
Quality queries input (macos-latest, nightly-latest)	1m 23s
Quality queries input (ubuntu-latest, nightly-latest)	1m 13s
	12m 57s

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