chore(primitives): remove rustc-hash workaround #2201

Job	Run time
docs	51s
clippy	1m 8s
features stable	2m 15s
check no_std	41s
features stable --all-targets	3m 9s
fmt	13s
features nightly	2m 30s
miri --no-default-features	5m 21s
features nightly --all-targets	3m 32s
miri	5m 18s
wasm	31s
miri --all-features	7m 37s
test ubuntu-latest stable --no-default-features	1m 7s
test ubuntu-latest stable	1m 10s
test ubuntu-latest nightly --no-default-features	1m 16s
test ubuntu-latest nightly	1m 16s
test ubuntu-latest 1.81 --no-default-features	32s
test ubuntu-latest 1.81	35s
test windows-latest stable --no-default-features	3m 27s
test windows-latest stable	3m 26s
test windows-latest nightly --no-default-features	3m 3s
test windows-latest nightly	2m 40s
test windows-latest 1.81 --no-default-features	1m 49s
test windows-latest 1.81	1m 14s
test ubuntu-latest 1.81 --features json	33s
test windows-latest 1.81 --features json	1m 36s
test ubuntu-latest nightly --all-features	1m 23s
test windows-latest nightly --all-features	2m 58s
deny / cargo deny check	16s
ci success	1s
	1h 1m 28s

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