chore: remove redundant cfgs #87

Job	Run time
clippy	27s
doctest	37s
cfg-check	19s
docs	30s
feature-checks	56s
fmt	16s
no-std	18s
test ubuntu-latest stable --no-default-features	18s
wasm-unknown	27s
wasm-wasi	38s
test ubuntu-latest stable	19s
test ubuntu-latest stable --all-features	29s
test ubuntu-latest nightly --no-default-features	26s
test ubuntu-latest nightly	33s
test ubuntu-latest nightly --all-features	33s
test ubuntu-latest 1.81 --no-default-features	27s
test ubuntu-latest 1.81	28s
test windows-latest stable --no-default-features	1m 41s
test windows-latest stable	1m 42s
test windows-latest stable --all-features	1m 55s
test windows-latest nightly --no-default-features	1m 9s
test windows-latest nightly	1m 12s
test windows-latest nightly --all-features	1m 25s
test windows-latest 1.81 --no-default-features	1m 28s
test windows-latest 1.81	1m 3s
	19m 36s

Provide feedback