Cleanup custom lints #5201

Job	Run time
msrv	2m 25s
rustfmt-clippy	1m 57s
build-windows (cargo-build, x86_64-pc-windows-msvc)	7m 7s
wasi	1m 37s
build-windows (cargo-test, x86_64-pc-windows-msvc)	6m 38s
build-macos (Cargo build (x64), cargo-build, x86_64-apple-darwin)	3m 1s
build-windows (cargo-c, x86_64-pc-windows-gnu)	6m 58s
build-unix (beta-build)	3m 11s
build-macos (Cargo test (x64), cargo-test, x86_64-apple-darwin)	3m 6s
build-unix (1.70.0-tests)	5m 16s
build-macos (Cargo C-build (x64), cargo-c, x86_64-apple-darwin)	2m 50s
build-unix (aom-tests)	5m 2s
build-macos (Cargo build (Arm64), cargo-build, aarch64-apple-darwin)	1m 57s
build-unix (dav1d-tests)	5m 47s
build-macos (Cargo C-build (Arm64), cargo-c, aarch64-apple-darwin)	4m 17s
build-unix (no-asm-tests)	8m 22s
build-unix (grcov-codecov)	13m 49s
build-unix (bench)	3m 38s
build-unix (doc)	2m 33s
build-unix (cargo-c)	4m 23s
build-unix (check-no-default)	1m 27s
build-unix (check-extra-feats)	3m 9s
build-unix (check-unstable-feats)	2m 21s
build-unix (fuzz)	5m 50s
build-unix (dav1d-tests-arm64, stable)	6m 11s
	1h 52m 52s

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