chore: rm bad non_exhaustive (#404) #1334

Job	Run time
test stable --no-default-features	39s
wasm-unknown	23s
test stable	28s
doctest	21s
test stable --all-features	57s
test nightly --no-default-features	35s
clippy	22s
test nightly	43s
docs	19s
test nightly --all-features	54s
feature-checks	39s
fmt	11s
test 1.81 --no-default-features	57s
test 1.81	57s
no-std	21s
wasm-wasi	21s
cfg-check	19s
examples	15s
feature-powerset	1m 12s
	10m 53s

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