Mark removed modules as stale #7862

Job	Run time
rustfmt	7s
validate	16s
test (stable, x86_64-unknown-linux-gnu)	3m 49s
lint-build	1m 5s
test (stable, x86_64-unknown-linux-musl)	5m 43s
test-wasm	1m 16s
test (stable, aarch64-unknown-linux-gnu)	2m 28s
test (stable, aarch64-unknown-linux-musl)	2m 21s
test (stable, x86_64-apple-darwin)	7m 36s
test (stable, x86_64-pc-windows-msvc)	5m 33s
test (stable, aarch64-apple-darwin, macos-latest, false, true)	5m 26s
test-projects	1m 36s
	37m 16s

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